1 |
A + B Problem |
JavaScript |
Naive |
2 |
Trailing Zeroes |
JavaScript |
Easy |
3 |
Digit Counts |
|
Easy |
4 |
Ugly Number II |
JavaScript |
Medium |
5 |
Kth Largest Element |
|
Medium |
6 |
Merge Two Sorted Arrays |
JavaScript |
Easy |
7 |
Serialize and Deserialize Binary Tree |
Python |
Medium |
8 |
Rotate Character Array |
Python |
Easy |
9 |
Fizz Buzz |
JavaScript |
Easy |
10 |
String Permutation II |
|
Medium |
11 |
Search Range in Binary Search Tree |
Python |
Medium |
12 |
Min Stack |
Python |
Medium |
13 |
Implement strStr() |
TypeScript |
Naive |
14 |
First Position of Target |
JavaScript |
Easy |
15 |
Permutations |
Python |
Medium |
16 |
Permutations II |
Python |
Medium |
17 |
Subsets |
Python |
Medium |
18 |
Subsets II |
Python |
Medium |
20 |
Dices Sum |
Python |
Medium |
21 |
Moving Circle |
|
Medium |
22 |
Flatten List |
Python |
Naive |
23 |
Is alphanumeric |
TypeScript |
Naive |
24 |
LFU Cache |
Python |
Hard |
25 |
Print X |
TypeScript |
Naive |
26 |
inner product |
|
Hard |
27 |
abc String |
|
Hard |
28 |
Search a 2D Matrix |
JavaScript |
Easy |
29 |
Interleaving String |
|
Hard |
30 |
Insert Interval |
|
Medium |
31 |
Partition Array |
TypeScript |
Medium |
32 |
Minimum Window Substring |
Python |
Medium |
33 |
N-Queens |
|
Medium |
34 |
N-Queens II |
|
Medium |
35 |
Reverse Linked List |
JavaScript TypeScript |
Easy |
36 |
Reverse Linked List II |
JavaScript TypeScript |
Medium |
37 |
Reverse 3-digit Integer |
JavaScript |
Naive |
38 |
Search a 2D Matrix II |
JavaScript |
Medium |
39 |
Recover Rotated Sorted Array |
JavaScript |
Easy |
40 |
Implement Queue by Two Stacks |
Python |
Medium |
41 |
Maximum Subarray |
JavaScript TypeScript |
Easy |
42 |
Maximum Subarray II |
Python |
Medium |
43 |
Maximum Subarray III |
JavaScript |
Hard |
44 |
Minimum Subarray |
Python |
Easy |
45 |
Maximum Subarray Difference |
JavaScript |
Medium |
46 |
Majority Element |
Python |
Easy |
47 |
Majority Element II |
Python |
Medium |
48 |
Majority Number III |
JavaScript |
Medium |
49 |
Sort Letters by Case |
Python |
Medium |
50 |
Product of Array Exclude Itself |
Python |
Easy |
51 |
Previous Permutation |
|
Medium |
52 |
Next Permutation |
|
Medium |
53 |
Reverse Words in a String |
Python |
Easy |
54 |
String to Integer (atoi) |
|
Hard |
55 |
Compare Strings |
JavaScript TypeScript |
Easy |
56 |
Two Sum |
JavaScript |
Easy |
57 |
3Sum |
Python |
Medium |
58 |
4Sum |
JavaScript Python |
Medium |
59 |
3Sum Closest |
JavaScript |
Medium |
60 |
Search Insert Position |
JavaScript TypeScript |
Easy |
61 |
Search for a Range |
JavaScript |
Medium |
62 |
Search in Rotated Sorted Array |
JavaScript |
Medium |
63 |
Search in Rotated Sorted Array II |
JavaScript |
Medium |
64 |
Merge Sorted Array (easy version) |
Python |
Easy |
65 |
Median of two Sorted Arrays |
|
Hard |
66 |
Binary Tree Preorder Traversal |
JavaScript |
Easy |
67 |
Binary Tree Inorder Traversal |
JavaScript TypeScript |
Easy |
68 |
Binary Tree Postorder Traversal |
JavaScript TypeScript |
Easy |
69 |
Binary Tree Level Order Traversal |
JavaScript TypeScript |
Easy |
70 |
Binary Tree Level Order Traversal II |
Python |
Medium |
71 |
Binary Tree Zigzag Level Order Traversal |
JavaScript TypeScript |
Medium |
72 |
Construct Binary Tree from Inorder and Postorder Traversal |
JavaScript |
Medium |
73 |
Construct Binary Tree from Preorder and Inorder Traversal |
JavaScript |
Medium |
74 |
First Bad Version |
Python |
Medium |
75 |
Find Peak Element |
Python |
Medium |
76 |
Longest Increasing Subsequence |
JavaScript |
Medium |
77 |
Longest Common Subsequence |
JavaScript |
Medium |
78 |
Longest Common Prefix |
TypeScript |
Medium |
79 |
Longest Common Substring |
JavaScript |
Medium |
80 |
Median |
TypeScript |
Easy |
81 |
Find Median from Data Stream |
|
Hard |
82 |
Single Number |
JavaScript |
Easy |
83 |
Single Number II |
JavaScript TypeScript |
Medium |
84 |
Single Number III |
Python |
Medium |
85 |
Insert Node in a Binary Search Tree |
Python |
Easy |
86 |
Binary Search Tree Iterator |
Python |
Hard |
87 |
Remove Node in Binary Search Tree |
Python |
Hard |
88 |
Lowest Common Ancestor of a Binary Tree |
Python |
Medium |
89 |
k Sum |
|
Hard |
90 |
k Sum II |
Python |
Medium |
91 |
Minimum Adjustment Cost |
|
Medium |
92 |
Backpack |
JavaScript TypeScript |
Medium |
93 |
Balanced Binary Tree |
JavaScript TypeScript |
Easy |
94 |
Binary Tree Maximum Path Sum |
JavaScript TypeScript |
Medium |
95 |
Validate Binary Search Tree |
JavaScript |
Medium |
96 |
Partition List |
JavaScript TypeScript |
Easy |
97 |
Maximum Depth of Binary Tree |
JavaScript TypeScript |
Easy |
98 |
Sort List |
Python |
Medium |
99 |
Reorder List |
Python |
Medium |
100 |
Remove Duplicates from Sorted Array |
Python |
Easy |
101 |
Remove Duplicates from Sorted Array II |
Python |
Easy |
102 |
Linked List Cycle |
Python |
Medium |
103 |
Linked List Cycle II |
Python |
Hard |
104 |
Merge K Sorted Lists |
Python |
Medium |
105 |
Copy List with Random Pointer |
Python |
Medium |
106 |
Convert Sorted List to Binary Search Tree |
Python |
Medium |
107 |
Word Break |
|
Medium |
108 |
Palindrome Partitioning II |
|
Medium |
109 |
Triangle |
JavaScript |
Medium |
110 |
Minimum Path Sum |
JavaScript |
Easy |
111 |
Climbing Stairs |
JavaScript |
Easy |
112 |
Remove Duplicates from Sorted List |
JavaScript |
Easy |
113 |
Remove Duplicates from Sorted List II |
Python |
Medium |
114 |
Unique Paths |
JavaScript |
Easy |
115 |
Unique Paths II |
JavaScript |
Easy |
116 |
Jump Game |
JavaScript |
Medium |
117 |
Jump Game II |
JavaScript |
Medium |
118 |
Distinct Subsequences |
Python |
Medium |
119 |
Edit Distance |
|
Medium |
120 |
Word Ladder |
|
Hard |
121 |
Word Ladder II |
|
Hard |
122 |
Largest Rectangle in Histogram |
|
Hard |
123 |
Word Search |
TypeScript |
Medium |
124 |
Longest Consecutive Sequence |
TypeScript |
Medium |
125 |
Backpack II |
JavaScript |
Medium |
126 |
Max Tree |
|
Hard |
127 |
Topological Sorting |
|
Medium |
128 |
Hash Function |
JavaScript |
Easy |
129 |
Rehashing |
|
Medium |
130 |
Heapify |
Python |
Medium |
131 |
The Skyline Problem |
|
Super |
132 |
Word Search II |
|
Hard |
133 |
Longest Word |
Python |
Easy |
134 |
LRU Cache |
Python |
Hard |
135 |
Combination Sum |
Python |
Medium |
136 |
Palindrome Partitioning |
|
Medium |
137 |
Clone Graph |
|
Medium |
138 |
Subarray Sum |
Python |
Easy |
139 |
Subarray Sum Closest |
|
Medium |
140 |
Fast Power |
Python |
Medium |
141 |
Sqrt(x) |
Python |
Easy |
142 |
O(1) Check Power of 2 |
JavaScript |
Easy |
143 |
Sort Colors II |
TypeScript |
Medium |
144 |
Interleaving Positive and Negative Numbers |
Python |
Medium |
145 |
Lowercase to Uppercase |
JavaScript |
Naive |
146 |
Lowercase to Uppercase II |
TypeScript |
Naive |
147 |
Narcissistic Number |
|
Easy |
148 |
Sort Colors |
TypeScript |
Medium |
149 |
Best Time to Buy and Sell Stock |
JavaScript |
Medium |
150 |
Best Time to Buy and Sell Stock II |
JavaScript |
Medium |
151 |
Best Time to Buy and Sell Stock III |
JavaScript |
Medium |
152 |
Combinations |
Python |
Medium |
153 |
Combination Sum II |
Python |
Medium |
154 |
Regular Expression Matching |
|
Hard |
155 |
Minimum Depth of Binary Tree |
JavaScript |
Easy |
156 |
Merge Intervals |
TypeScript |
Easy |
157 |
Unique Characters |
Python |
Easy |
158 |
Valid Anagram |
JavaScript |
Easy |
159 |
Find Minimum in Rotated Sorted Array |
JavaScript |
Medium |
160 |
Find Minimum in Rotated Sorted Array II |
JavaScript |
Medium |
161 |
Rotate Image |
JavaScript |
Medium |
162 |
Set Matrix Zeroes |
JavaScript |
Medium |
163 |
Unique Binary Search Trees |
JavaScript |
Medium |
165 |
Merge Two Sorted Lists |
JavaScript |
Easy |
166 |
Nth to Last Node in List |
Python |
Easy |
167 |
Add Two Numbers |
JavaScript |
Easy |
168 |
Burst Balloons |
|
Hard |
169 |
Tower of Hanoi |
|
Medium |
170 |
Rotate List |
JavaScript |
Medium |
171 |
Anagrams |
JavaScript |
Medium |
172 |
Remove Element |
Python |
Easy |
173 |
Insertion Sort List |
Python |
Easy |
174 |
Remove Nth Node From End of List |
JavaScript |
Easy |
175 |
Invert Binary Tree |
JavaScript |
Easy |
176 |
Route Between Two Nodes in Graph |
|
Medium |
177 |
Convert Sorted Array to Binary Search Tree With Minimal Height. |
Python |
Easy |
178 |
Graph Valid Tree |
|
Medium |
179 |
Update Bits |
TypeScript |
Medium |
180 |
Binary Representation |
|
Hard |
181 |
Flip Bits |
JavaScript |
Easy |
182 |
Delete Digits |
|
Medium |
183 |
Wood Cut |
TypeScript |
Hard |
184 |
Largest Number |
|
Medium |
185 |
Matrix Zigzag Traversal |
JavaScript |
Easy |
186 |
Max Points on a Line |
|
Medium |
187 |
Gas Station |
|
Medium |
188 |
Insert five |
TypeScript |
Easy |
189 |
First Missing Positive |
JavaScript |
Medium |
191 |
Maximum Product Subarray |
JavaScript |
Medium |
192 |
Wildcard Matching |
|
Hard |
193 |
Longest Valid Parentheses |
JavaScript |
Medium |
194 |
Find Words |
TypeScript |
Medium |
196 |
Missing Number |
JavaScript |
Easy |
197 |
Permutation Index |
|
Medium |
198 |
Permutation Index II |
|
Medium |
199 |
Judge Connection |
|
Medium |
200 |
Longest Palindromic Substring |
|
Medium |
201 |
Segment Tree Build |
Python |
Medium |
202 |
Segment Tree Query |
Python |
Medium |
203 |
Segment Tree Modify |
Python |
Medium |
204 |
Singleton |
Python |
Easy |
205 |
Interval Minimum Number |
Python |
Medium |
206 |
Interval Sum |
Python |
Medium |
207 |
Interval Sum II |
Python |
Hard |
208 |
Assignment Operator Overloading (C++ Only) |
|
Medium |
209 |
First Unique Character in a String |
JavaScript |
Easy |
210 |
Null-terminated String |
|
Easy |
211 |
String Permutation |
JavaScript |
Easy |
212 |
Space Replacement |
Python |
Easy |
213 |
String Compression |
JavaScript |
Easy |
214 |
Max of Array |
TypeScript |
Naive |
215 |
Rate Limiter |
|
Hard |
216 |
Substring Rotation |
|
Easy |
217 |
Remove Duplicates from Unsorted List |
|
Easy |
218 |
Student Level |
|
Easy |
219 |
Insert Node in Sorted Linked List |
|
Easy |
220 |
Hail conjecture |
|
Easy |
221 |
Add Two Numbers II |
JavaScript |
Medium |
222 |
Setter and Getter |
|
Naive |
223 |
Palindrome Linked List |
JavaScript |
Medium |
224 |
Implement Three Stacks by Single Array |
|
Medium |
225 |
Find Node in Linked List |
|
Naive |
226 |
Set of Stacks II |
|
Hard |
227 |
Mock Hanoi Tower by Stacks |
|
Easy |
228 |
Middle of Linked List |
|
Naive |
229 |
Stack Sorting |
|
Medium |
230 |
Animal Shelter |
|
Hard |
231 |
Typeahead |
|
Hard |
232 |
Tiny Url |
|
Medium |
233 |
Next Smaller and Larger Number with the Same 1 Bits |
|
Medium |
234 |
Web Crawler |
|
Super |
235 |
Prime Factorization |
|
Easy |
236 |
Swap Bits |
|
Easy |
237 |
Missing Integer |
|
Easy |
238 |
Monochrome Screen |
|
Easy |
239 |
Root of Equation |
|
Easy |
240 |
Program Check |
|
Hard |
241 |
String to Integer |
|
Naive |
242 |
Convert Binary Tree to Linked Lists by Depth |
Python |
Easy |
243 |
Amicable Pair |
|
Easy |
244 |
Delete Char |
|
Medium |
245 |
Subtree |
|
Medium |
246 |
Binary Tree Path Sum II |
|
Medium |
247 |
Segment Tree Query II |
Python |
Medium |
248 |
Count of Smaller Number |
JavaScript TypeScript |
Medium |
249 |
Count of Smaller Number before itself |
JavaScript |
Hard |
250 |
Special Palindrome String |
TypeScript |
Easy |
251 |
Array compression |
|
Medium |
252 |
arithmetic matrix |
|
Medium |
253 |
URL Edcode |
TypeScript |
Easy |
254 |
Drop Eggs |
|
Easy |
255 |
Multi-string search |
TypeScript |
Easy |
256 |
The Maximum Order |
|
Hard |
257 |
Longest String Chain |
|
Medium |
258 |
Map Jump |
|
Hard |
259 |
Find the largest Divisor |
TypeScript |
Medium |
260 |
Same Diagonal Elements |
TypeScript |
Easy |
261 |
Maximum Connected Area |
|
Medium |
262 |
heir tree |
|
Medium |
263 |
Matching of parentheses |
TypeScript |
Easy |
264 |
Counting Universal Subarrays |
|
Easy |
265 |
Maximum Non-Negative Subarray |
TypeScript |
Easy |
266 |
Expect Distance |
|
Medium |
267 |
minimum rest days |
|
Medium |
268 |
Parentheses Score |
TypeScript |
Medium |
269 |
two colors' tower |
|
Hard |
270 |
Letter Combinations of a Phone Number II |
|
Medium |
271 |
prefix notation to postfix notation |
|
Medium |
272 |
Climbing Stairs II |
|
Easy |
273 |
Test Strategy |
|
Medium |
274 |
Make binary tree average |
|
Super |
275 |
Moving Shed |
|
Medium |
276 |
another zuma |
TypeScript |
Medium |
277 |
Word Spacing |
|
Easy |
278 |
Paint Fill |
JavaScript |
Medium |
279 |
Number of Ways to Represent N Cents |
|
Medium |
280 |
Closest City |
TypeScript |
Easy |
281 |
Paint the Ceiling |
|
Medium |
282 |
Decrypt the String |
TypeScript |
Easy |
283 |
Max of 3 Numbers |
JavaScript |
Naive |
285 |
Tall Building |
TypeScript |
Medium |
286 |
Inversions |
|
Hard |
287 |
The Competition of View |
|
Medium |
288 |
Container Design |
Python |
Easy |
289 |
Container Design II |
Python |
Easy |
290 |
Sorted Arrangement |
|
Hard |
291 |
Second Diameter |
|
Medium |
292 |
Sort Anagrams Array |
|
Easy |
293 |
The depth of the tunnel |
|
Medium |
294 |
Linked List Simplification |
TypeScript |
Easy |
295 |
Intersection |
TypeScript |
Easy |
296 |
Unique Array |
|
Easy |
297 |
Find the maximum |
TypeScript |
Naive |
298 |
Find prime |
TypeScript |
Naive |
299 |
Typing practising |
|
Easy |
300 |
Meeting Room IV |
|
Medium |
301 |
Lucky Number II |
|
Hard |
302 |
Digital Pairing |
|
Easy |
303 |
Beautiful Number |
|
Medium |
304 |
Maximum product |
TypeScript |
Medium |
305 |
longest increasing path in a matrix |
|
Hard |
306 |
Product List |
TypeScript |
Easy |
307 |
Transform String |
|
Medium |
308 |
Special Substring |
|
Medium |
309 |
Interleaved Array |
TypeScript |
Easy |
310 |
Digital distortion |
|
Easy |
311 |
Pioneering palindrome |
TypeScript |
Easy |
312 |
Bull Cards |
|
Medium |
313 |
Minimum Insertion |
|
Hard |
314 |
The Lost Record |
|
Medium |
315 |
Reformat String |
TypeScript |
Medium |
316 |
Combination set |
TypeScript |
Medium |
317 |
Minimum Parentheses Matching |
|
Medium |
318 |
Character Grid |
TypeScript |
Easy |
319 |
Square Queue |
|
Hard |
321 |
perfect string |
|
Easy |
322 |
Chess Game |
|
Easy |
323 |
string game |
|
Hard |
325 |
Football |
|
Hard |
326 |
Slide Soduku |
|
Easy |
327 |
Distance Metrics |
TypeScript |
Medium |
328 |
String Partition |
|
Medium |
329 |
Double Array |
|
Easy |
330 |
Increasing Number |
|
Medium |
331 |
Confusing Number |
|
Medium |
332 |
restoreArray |
|
Hard |
333 |
Identifying Strings |
|
Medium |
334 |
Order Check |
TypeScript |
Easy |
335 |
plateau |
|
Medium |
336 |
Text Compression |
|
Easy |
337 |
Team notification |
|
Medium |
339 |
Median II |
|
Medium |
340 |
Red and Black Chess |
|
Hard |
342 |
Valley sequence |
|
Medium |
343 |
Circle |
|
Easy |
344 |
Song Time |
|
Hard |
345 |
the sum of array |
|
Easy |
346 |
xorsum of Interval extremum |
|
Hard |
347 |
maximum number expectation |
|
Hard |
348 |
TrackSwitching |
TypeScript |
Medium |
349 |
Developer-Tester Integration |
|
Hard |
350 |
Slash Separating |
|
Hard |
351 |
External Sorting Practising |
|
Easy |
352 |
PrettyPrint |
|
Easy |
353 |
Largest letter |
TypeScript |
Easy |
354 |
lottery draw |
|
Hard |
355 |
shuttleInBuildings |
|
Hard |
357 |
Symmetrical Suffix |
|
Medium |
358 |
treePlanning |
TypeScript |
Easy |
359 |
makeEquilateralTriangle |
TypeScript |
Easy |
360 |
Sliding Window Median |
|
Hard |
362 |
Sliding Window Maximum |
JavaScript |
Hard |
363 |
Trapping Rain Water |
|
Medium |
364 |
Trapping Rain Water II |
|
Hard |
365 |
Count 1 in Binary |
Python |
Easy |
366 |
Fibonacci |
JavaScript |
Naive |
367 |
Expression Tree Build |
|
Hard |
368 |
Expression Evaluation |
|
Hard |
369 |
Convert Expression to Polish Notation |
|
Medium |
370 |
Convert Expression to Reverse Polish Notation |
|
Medium |
371 |
Print Numbers by Recursion |
JavaScript |
Medium |
372 |
Delete Node in a Linked List |
Python |
Easy |
373 |
Partition Array by Odd and Even |
Python |
Easy |
374 |
Spiral Matrix |
JavaScript |
Medium |
375 |
Clone Binary Tree |
JavaScript |
Medium |
376 |
Binary Tree Path Sum |
Python |
Easy |
378 |
Convert Binary Tree to Doubly Linked List |
Python |
Medium |
379 |
Reorder array to construct the minimum number |
|
Medium |
380 |
Intersection of Two Linked Lists |
Python |
Medium |
381 |
Spiral Matrix II |
|
Medium |
382 |
Triangle Count |
|
Medium |
383 |
Container With Most Water |
|
Medium |
384 |
Longest Substring Without Repeating Characters |
JavaScript |
Medium |
385 |
ArrayList |
|
Easy |
386 |
Longest Substring with At Most K Distinct Characters |
|
Medium |
387 |
The Smallest Difference |
JavaScript |
Medium |
388 |
Permutation Sequence |
|
Medium |
389 |
Valid Sudoku |
TypeScript |
Easy |
390 |
Find Peak Element II |
|
Hard |
391 |
Number of Airplanes in the Sky |
|
Medium |
392 |
House Robber |
JavaScript |
Medium |
393 |
Best Time to Buy and Sell Stock IV |
JavaScript |
Medium |
394 |
Coins in a Line |
|
Medium |
395 |
Coins in a Line II |
|
Medium |
396 |
Coins in a Line III |
|
Hard |
397 |
Longest Continuous Increasing Subsequence |
JavaScript |
Easy |
398 |
Longest Ascent Path |
|
Hard |
400 |
Maximum Gap |
TypeScript |
Medium |
401 |
Kth Smallest Number in Sorted Matrix |
JavaScript |
Medium |
402 |
Continuous Subarray Sum |
JavaScript |
Medium |
403 |
Continuous Subarray Sum II |
|
Medium |
404 |
Subarray Sum II |
|
Medium |
405 |
Submatrix Sum |
|
Medium |
406 |
Minimum Size Subarray Sum |
JavaScript |
Medium |
407 |
Plus One |
JavaScript |
Easy |
408 |
Add Binary |
JavaScript |
Easy |
411 |
Gray Code |
TypeScript |
Medium |
412 |
Candy |
|
Medium |
413 |
Reverse Integer |
JavaScript |
Easy |
414 |
Divide Two Integers |
TypeScript |
Medium |
415 |
Valid Palindrome |
JavaScript |
Medium |
417 |
Valid Number |
TypeScript |
Easy |
418 |
Integer to Roman |
JavaScript |
Medium |
419 |
Roman to Integer |
JavaScript |
Medium |
420 |
Count and Say |
|
Easy |
421 |
Simplify Path |
TypeScript |
Medium |
422 |
Length of Last Word |
JavaScript |
Easy |
423 |
Valid Parentheses |
JavaScript |
Easy |
424 |
Evaluate Reverse Polish Notation |
Python |
Medium |
425 |
Letter Combinations of a Phone Number |
JavaScript |
Medium |
426 |
Restore IP Addresses |
JavaScript |
Medium |
427 |
Generate Parentheses |
JavaScript |
Medium |
428 |
Pow(x, n) |
Python |
Medium |
430 |
Scramble String |
|
Hard |
431 |
Connected Component in Undirected Graph |
|
Medium |
432 |
Find the Weak Connected Component in the Directed Graph |
|
Medium |
433 |
Number of Islands |
JavaScript |
Easy |
434 |
Number of Islands II |
|
Medium |
435 |
Post Office Problem |
|
Hard |
436 |
Maximal Square |
JavaScript |
Medium |
437 |
Copy Books |
|
Medium |
438 |
Copy Books II |
|
Hard |
439 |
Segment Tree Build II |
Python |
Medium |
440 |
Backpack III |
|
Medium |
442 |
Implement Trie |
Python |
Medium |
443 |
Two Sum - Greater than target |
|
Medium |
444 |
graph valid tree II |
|
Medium |
445 |
Cosine Similarity |
Python |
Easy |
447 |
Search in a Big Sorted Array |
|
Medium |
448 |
Inorder Successor in BST |
Python |
Medium |
449 |
Char to Integer |
|
Naive |
450 |
Reverse Nodes in k-Group |
JavaScript |
Hard |
451 |
Swap Nodes in Pairs |
JavaScript |
Easy |
452 |
Remove Linked List Elements |
JavaScript |
Easy |
453 |
Flatten Binary Tree to Linked List |
JavaScript |
Easy |
454 |
Rectangle Area |
Python |
Naive |
455 |
Student ID |
|
Easy |
456 |
Reference |
|
Naive |
457 |
Classical Binary Search |
Python |
Easy |
458 |
Last Position of Target |
|
Easy |
459 |
Closest Number in Sorted Array |
|
Easy |
460 |
Find K Closest Elements |
JavaScript |
Medium |
461 |
Kth Smallest Numbers in Unsorted Array |
|
Medium |
462 |
Total Occurrence of Target |
|
Easy |
463 |
Sort Integers |
JavaScript |
Naive |
464 |
Sort Integers II |
JavaScript |
Easy |
465 |
Kth Smallest Sum In Two Sorted Arrays |
|
Hard |
466 |
Count Linked List Nodes |
JavaScript |
Naive |
467 |
Complete Binary Tree |
|
Easy |
468 |
Symmetric Binary Tree |
|
Easy |
469 |
Same Tree |
JavaScript |
Easy |
470 |
Tweaked Identical Binary Tree |
|
Easy |
471 |
Top K Frequent Words |
JavaScript |
Medium |
472 |
Binary Tree Path Sum III |
|
Hard |
473 |
Add and Search Word - Data structure design |
|
Medium |
474 |
Lowest Common Ancestor II |
Python |
Easy |
475 |
Binary Tree Maximum Path Sum II |
|
Medium |
476 |
Stone Game |
JavaScript |
Medium |
477 |
Surrounded Regions |
Python |
Medium |
478 |
Simple Calculator |
TypeScript |
Naive |
479 |
Second Max of Array |
JavaScript |
Easy |
480 |
Binary Tree Paths |
JavaScript |
Easy |
481 |
Binary Tree Leaf Sum |
|
Easy |
482 |
Binary Tree Level Sum |
|
Easy |
483 |
Convert Linked List to Array List |
|
Naive |
484 |
Swap Two Integers in Array |
JavaScript |
Naive |
485 |
Generate ArrayList with Given Size |
|
Naive |
486 |
Merge K Sorted Arrays |
JavaScript |
Medium |
487 |
Name Deduplication |
|
Easy |
488 |
Happy Number |
JavaScript |
Easy |
489 |
Convert Array List to Linked List |
|
Easy |
490 |
Set of Stacks |
|
Easy |
491 |
Palindrome Number |
JavaScript |
Easy |
492 |
Implement Queue by Linked List |
Python |
Easy |
493 |
Implement Queue by Linked List II |
|
Easy |
494 |
Implement Stack by Two Queues |
|
Easy |
495 |
Implement Stack |
Python |
Easy |
496 |
Toy Factory |
Python |
Easy |
497 |
Shape Factory |
|
Easy |
498 |
Parking Lot |
|
Hard |
499 |
Word Count (Map Reduce) |
|
Medium |
500 |
Inverted Index |
|
Medium |
501 |
Design Twitter |
|
Medium |
502 |
Mini Cassandra |
|
Medium |
503 |
Anagram (Map Reduce) |
|
Medium |
504 |
Inverted Index (Map Reduce) |
|
Medium |
505 |
Web Logger |
|
Medium |
506 |
Movie Recommendation |
|
Medium |
507 |
Wiggle Sort II |
|
Hard |
508 |
Wiggle Sort |
|
Medium |
509 |
Mini Yelp |
|
Hard |
510 |
Maximal Rectangle |
|
Hard |
511 |
Swap Two Nodes in Linked List |
JavaScript |
Medium |
512 |
Decode Ways |
JavaScript |
Medium |
513 |
Perfect Squares |
JavaScript |
Medium |
514 |
Paint Fence |
TypeScript |
Easy |
515 |
Paint House |
TypeScript |
Medium |
516 |
Paint House II |
TypeScript |
Hard |
517 |
Ugly Number |
JavaScript |
Easy |
518 |
Super Ugly Number |
JavaScript |
Medium |
519 |
Consistent Hashing |
|
Easy |
520 |
Consistent Hashing II |
|
Medium |
521 |
Remove Duplicate Numbers in Array |
|
Easy |
522 |
Tiny Url II |
|
Medium |
523 |
Url Parser |
|
Medium |
524 |
Left Pad |
Python |
Easy |
525 |
Mini Uber |
|
Medium |
526 |
Load Balancer |
|
Medium |
527 |
Trie Serialization |
|
Hard |
528 |
Flatten Nested List Iterator |
Python |
Medium |
529 |
Geohash |
|
Medium |
530 |
Geohash II |
|
Medium |
531 |
Six Degrees |
|
Medium |
532 |
Reverse Pairs |
JavaScript |
Medium |
533 |
Two Sum - Closest to target |
|
Medium |
534 |
House Robber II |
JavaScript |
Medium |
535 |
House Robber III |
|
Medium |
537 |
N-Gram (Map Reduce) |
|
Medium |
538 |
Memcache |
|
Medium |
539 |
Move Zeroes |
JavaScript |
Easy |
540 |
Zigzag Iterator |
Python |
Medium |
541 |
Zigzag Iterator II |
|
Medium |
543 |
Kth Largest in N Arrays |
|
Hard |
544 |
Top k Largest Numbers |
|
Medium |
545 |
Top k Largest Numbers II |
|
Medium |
546 |
Implement Queue by Interface |
|
Easy |
547 |
Intersection of Two Arrays |
Python |
Easy |
548 |
Intersection of Two Arrays II |
JavaScript |
Easy |
549 |
Top K Frequent Words (Map Reduce) |
|
Medium |
550 |
Top K Frequent Words II |
|
Hard |
551 |
Nested List Weight Sum |
Python |
Easy |
552 |
Create Maximum Number |
|
Hard |
553 |
Bomb Enemy |
|
Medium |
554 |
Sort Integers (Map Reduce) |
|
Medium |
555 |
Counting Bloom Filter |
Python |
Medium |
556 |
Standard Bloom Filter |
Python |
Medium |
557 |
Count Characters |
|
Easy |
558 |
Sliding Window Matrix Maximum |
|
Medium |
559 |
Trie Service |
|
Medium |
560 |
Friendship Service |
|
Easy |
561 |
Array Distance |
|
Hard |
562 |
Backpack IV |
JavaScript |
Medium |
563 |
Backpack V |
JavaScript |
Medium |
564 |
Combination Sum IV |
JavaScript |
Medium |
565 |
Heart Beat |
|
Medium |
566 |
GFS Client |
|
Medium |
567 |
maximum score |
TypeScript |
Medium |
568 |
Three Chances |
|
Medium |
569 |
Add Digits |
JavaScript |
Easy |
570 |
Find the Missing Number II |
|
Medium |
571 |
Judgment repetition |
TypeScript |
Medium |
572 |
Music Pairs |
TypeScript |
Easy |
573 |
Build Post Office II |
|
Hard |
574 |
Build Post Office |
|
Medium |
575 |
Decode String |
TypeScript |
Medium |
576 |
Split Array |
TypeScript |
Medium |
577 |
Merge K Sorted Interval Lists |
|
Medium |
578 |
Lowest Common Ancestor III |
Python |
Medium |
581 |
Longest Repeating Subsequence |
|
Medium |
582 |
Word Break II |
|
Hard |
584 |
Drop Eggs II |
|
Medium |
585 |
Maximum Number in Mountain Sequence |
JavaScript |
Medium |
586 |
Sqrt(x) II |
|
Medium |
587 |
Two Sum - Unique pairs |
|
Medium |
588 |
Partition Equal Subset Sum |
JavaScript |
Medium |
589 |
Connecting Graph |
|
Medium |
590 |
Connecting Graph II |
|
Medium |
591 |
Connecting Graph III |
|
Medium |
593 |
Stone Game II |
|
Medium |
594 |
strStr II |
|
Hard |
595 |
Binary Tree Longest Consecutive Sequence |
JavaScript |
Easy |
596 |
Minimum Subtree |
|
Easy |
597 |
Subtree with Maximum Average |
|
Easy |
598 |
Zombie in Matrix |
|
Medium |
600 |
Smallest Rectangle Enclosing Black Pixels |
|
Hard |
601 |
Flatten 2D Vector |
Python |
Medium |
602 |
Russian Doll Envelopes |
|
Hard |
603 |
Largest Divisible Subset |
|
Medium |
604 |
Window Sum |
JavaScript |
Easy |
605 |
Sequence Reconstruction |
|
Medium |
606 |
Kth Largest Element II |
|
Medium |
607 |
Two Sum III - Data structure design |
Python |
Easy |
608 |
Two Sum II - Input array is sorted |
JavaScript |
Medium |
609 |
Two Sum - Less than or equal to target |
TypeScript |
Medium |
610 |
Two Sum - Difference equals to target |
|
Medium |
611 |
Knight Shortest Path |
|
Medium |
612 |
K Closest Points |
|
Medium |
613 |
High Five |
|
Medium |
614 |
Binary Tree Longest Consecutive Sequence II |
JavaScript |
Medium |
615 |
Course Schedule |
|
Medium |
616 |
Course Schedule II |
|
Medium |
617 |
Maximum Average Subarray II |
|
Medium |
618 |
Search Graph Nodes |
|
Medium |
619 |
Binary Tree Longest Consecutive Sequence III |
|
Medium |
620 |
Maximum Subarray IV |
|
Medium |
621 |
Maximum Subarray V |
|
Hard |
622 |
Frog Jump |
|
Hard |
623 |
K Edit Distance |
|
Hard |
624 |
Remove Substrings |
|
Medium |
625 |
Partition Array II |
|
Medium |
626 |
Rectangle Overlap |
|
Easy |
627 |
Longest Palindrome |
JavaScript |
Easy |
628 |
Maximum Subtree |
|
Easy |
629 |
Minimum Spanning Tree |
|
Hard |
630 |
Knight Shortest Path II |
|
Medium |
631 |
Maximal Square II |
|
Medium |
632 |
Binary Tree Maximum Node |
Python |
Easy |
633 |
Find the Duplicate Number |
JavaScript |
Hard |
634 |
Word Squares |
|
Hard |
635 |
Boggle Game |
|
Hard |
636 |
132 Pattern |
|
Medium |
637 |
Valid Word Abbreviation |
JavaScript |
Easy |
638 |
Isomorphic Strings |
JavaScript |
Easy |
639 |
Word Abbreviation |
|
Hard |
640 |
One Edit Distance |
|
Medium |
641 |
Missing Ranges |
TypeScript |
Medium |
642 |
Moving Average from Data Stream |
Python |
Easy |
643 |
Longest Absolute File Path |
|
Medium |
644 |
Strobogrammatic Number |
JavaScript |
Easy |
645 |
Find the Celebrity |
|
Medium |
646 |
First Position Unique Character |
JavaScript |
Easy |
647 |
Find All Anagrams in a String |
JavaScript |
Medium |
648 |
Unique Word Abbreviation |
Python |
Medium |
649 |
Binary Tree Upside Down |
JavaScript |
Medium |
650 |
Find Leaves of Binary Tree |
Python |
Medium |
651 |
Binary Tree Vertical Order Traversal |
JavaScript |
Medium |
652 |
Factorization |
|
Medium |
653 |
Expression Add Operators |
|
Hard |
654 |
Sparse Matrix Multiplication |
|
Medium |
655 |
Add Strings |
JavaScript |
Easy |
656 |
Multiply Strings |
|
Medium |
657 |
Insert Delete GetRandom O(1) |
|
Medium |
658 |
Swap Without Extra Variable (Only C++) |
|
Easy |
659 |
Encode and Decode Strings |
Python |
Medium |
660 |
Read N Characters Given Read4 II - Call multiple times |
|
Hard |
661 |
Convert BST to Greater Tree |
JavaScript |
Easy |
662 |
Guess Number Higher or Lower |
Python |
Easy |
663 |
Walls and Gates |
|
Medium |
664 |
Counting Bits |
JavaScript |
Medium |
665 |
Range Sum Query 2D - Immutable |
Python |
Medium |
666 |
Guess Number Higher or Lower II |
|
Medium |
667 |
Longest Palindromic Subsequence |
|
Medium |
668 |
Ones and Zeroes |
|
Medium |
669 |
Coin Change |
JavaScript |
Medium |
671 |
Rotate Words |
Python |
Easy |
676 |
Decode Ways II |
|
Hard |
677 |
Number of Big Islands |
TypeScript |
Medium |
678 |
Shortest Palindrome |
|
Medium |
679 |
Unique Paths III |
|
Hard |
680 |
Split String |
Python |
Medium |
681 |
First Missing Prime Number |
|
Medium |
683 |
Word Break III |
|
Medium |
684 |
Missing String |
JavaScript |
Easy |
685 |
First Unique Number in Data Stream |
JavaScript |
Medium |
686 |
Remove Arbitrary Space |
JavaScript |
Easy |
688 |
The Number In Words |
|
Medium |
689 |
Two Sum IV - Input is a BST |
Python |
Medium |
690 |
Factorial |
|
Hard |
691 |
Recover Binary Search Tree |
JavaScript |
Medium |
692 |
Sliding Window Unique Elements Sum |
JavaScript |
Medium |
693 |
Remove Digits |
|
Medium |
696 |
Course Schedule III |
|
Hard |
697 |
Sum of Square Numbers |
JavaScript |
Easy |
698 |
Maximum Distance in Arrays |
|
Medium |
699 |
Check Sum of K Primes |
|
Hard |
700 |
Cutting a Rod |
JavaScript |
Medium |
701 |
Trim a Binary Search Tree |
JavaScript |
Medium |
702 |
Concatenated String with Uncommon Characters of Two Strings |
JavaScript |
Easy |
703 |
Folding Array |
|
Hard |
704 |
Bulb Switcher II |
|
Medium |
706 |
Binary Watch |
TypeScript |
Medium |
707 |
Optimal Account Balancing |
|
Super |
708 |
Elevator system - OO Design |
|
Hard |
709 |
Restaurant OO Design |
|
Hard |
712 |
Vending machine OO Design |
|
Hard |
714 |
Black Jack OO Design |
|
Medium |
716 |
Add and Search |
TypeScript |
Easy |
717 |
Tree Longest Path With Same Value |
|
Medium |
718 |
Repeat String |
|
Medium |
719 |
Calculate Maximum Value |
|
Medium |
720 |
Rearrange a String With Integers |
JavaScript |
Easy |
721 |
Next Sparse Number |
|
Hard |
722 |
Maximum Subarray VI |
|
Super |
723 |
Rotate Bits - Left |
TypeScript |
Medium |
724 |
Minimum Partition |
|
Medium |
725 |
Boolean Parenthesization |
|
Hard |
726 |
Check Full Binary Tree |
JavaScript |
Medium |
727 |
Chinese Remainder Theorem |
|
Hard |
728 |
Three Distinct Factors |
TypeScript |
Medium |
729 |
Last Digit By Factorial Divide |
|
Medium |
730 |
Sum of All Subsets |
JavaScript |
Easy |
731 |
Restaurant II OO Design |
|
Hard |
732 |
Hotel II OO Design |
|
Hard |
734 |
Number of Subsequences of Form a^i b^j c^k |
|
Medium |
735 |
Replace With Greatest From Right |
Python |
Medium |
737 |
Find Elements in Matrix |
JavaScript |
Easy |
738 |
Count Different Palindromic Subsequences |
|
Hard |
739 |
24 Game |
|
Hard |
740 |
Coin Change 2 |
JavaScript |
Medium |
741 |
Calculate Maximum Value II |
|
Medium |
742 |
Self Dividing Numbers |
|
Medium |
743 |
Monotone Increasing Digits |
|
Medium |
744 |
Sum of first K even-length Palindrome numbers |
|
Medium |
745 |
Palindromic Ranges |
|
Medium |
746 |
Design Tic-Tac-Toe |
|
Hard |
747 |
Coffee Maker OO Design |
|
Medium |
748 |
Kindle OO Design |
|
Medium |
749 |
John's backyard garden |
JavaScript |
Easy |
750 |
Portal |
|
Medium |
751 |
John's business |
|
Medium |
752 |
Rogue Knight Sven |
|
Medium |
756 |
Multiply Two Numbers |
JavaScript |
Easy |
757 |
Shortest Unordered Array |
TypeScript |
Easy |
759 |
Time Angle |
JavaScript |
Easy |
760 |
Binary Tree Right Side View |
JavaScript |
Medium |
761 |
Smallest Subset |
JavaScript |
Medium |
762 |
Longest Common Subsequence II |
|
Hard |
763 |
Hex Conversion |
JavaScript |
Easy |
764 |
Calculate Circumference And Area |
Python |
Easy |
765 |
Valid Triangle |
JavaScript |
Easy |
766 |
Leap Year |
JavaScript |
Easy |
767 |
Reverse Array |
JavaScript |
Easy |
768 |
Yang Hui Triangle |
JavaScript |
Easy |
770 |
Maximum and Minimum |
JavaScript |
Easy |
771 |
Double Factorial |
|
Easy |
772 |
Group Anagrams |
|
Medium |
773 |
Valid Anagrams |
JavaScript |
Easy |
774 |
Repeated DNA |
JavaScript |
Medium |
775 |
Palindrome Pairs |
|
Hard |
776 |
Strobogrammatic Number II |
TypeScript |
Medium |
777 |
Valid Perfect Square |
JavaScript |
Easy |
778 |
Pacific Atlantic Water Flow |
Python |
Medium |
779 |
Generalized Abbreviation |
TypeScript |
Medium |
780 |
Remove Invalid Parentheses |
|
Hard |
782 |
AND and OR |
TypeScript |
Medium |
783 |
Minimum Risk Path |
|
Hard |
784 |
The Longest Common Prefix II |
|
Easy |
785 |
Maximum Weighted Sum Path |
JavaScript |
Medium |
786 |
Linked List Weighted Sum In Reverse Order |
|
Easy |
787 |
The Maze |
|
Medium |
788 |
The Maze II |
|
Medium |
789 |
The Maze III |
|
Hard |
790 |
Parser |
|
Medium |
791 |
Merge Number |
JavaScript |
Medium |
792 |
Kth Prime Number |
TypeScript |
Easy |
793 |
Intersection of Arrays |
|
Medium |
794 |
Sliding Puzzle II |
|
Hard |
795 |
4-Way Unique Paths |
|
Medium |
796 |
Open the Lock |
|
Hard |
797 |
Reach a Number |
|
Easy |
798 |
Backpack VII |
|
Medium |
799 |
Backpack VIII |
|
Medium |
800 |
Backpack IX |
JavaScript |
Medium |
801 |
Backpack X |
|
Medium |
802 |
Sudoku Solver |
|
Hard |
803 |
Shortest Distance from All Buildings |
|
Hard |
804 |
Number of Distinct Islands II |
|
Hard |
805 |
Maximum Association Set |
|
Medium |
806 |
Buy Fruits |
|
Medium |
807 |
Palindrome Number II |
|
Easy |
808 |
Movie Network |
|
Medium |
809 |
K-th Symbol in Grammar |
|
Medium |
810 |
Swim in Rising Water |
|
Hard |
811 |
Swap Adjacent in LR String |
|
Medium |
812 |
Bold Words in String |
TypeScript |
Easy |
813 |
Find Anagram Mappings |
JavaScript |
Easy |
814 |
Shortest Path in Undirected Graph |
|
Medium |
815 |
Course Schedule IV |
|
Hard |
816 |
Traveling Salesman Problem |
|
Hard |
817 |
Range Sum Query 2D - Mutable |
|
Medium |
818 |
Subset With Target |
|
Hard |
819 |
Word Sorting |
|
Medium |
820 |
Rectangle |
|
Medium |
821 |
Time Intersection |
|
Medium |
822 |
Reverse Order Storage |
JavaScript |
Easy |
823 |
Input Stream |
JavaScript |
Easy |
824 |
Single Number IV |
JavaScript |
Medium |
825 |
Bus Station |
|
Hard |
826 |
Computer Maintenance |
|
Hard |
828 |
Word Pattern |
JavaScript |
Easy |
829 |
Word Pattern II |
|
Hard |
830 |
String Sort |
|
Easy |
831 |
3Sum II |
|
Medium |
832 |
Count Negative Number |
|
Medium |
833 |
Process Sequence |
|
Medium |
834 |
Remove Duplicate Letters |
JavaScript |
Medium |
835 |
Hamming Distance |
JavaScript TypeScript |
Easy |
836 |
Partition to K Equal Sum Subsets |
|
Hard |
837 |
Palindromic Substrings |
JavaScript |
Medium |
838 |
Subarray Sum Equals K |
JavaScript |
Easy |
839 |
Merge Two Sorted Interval Lists |
TypeScript |
Easy |
840 |
Range Sum Query - Mutable |
Python |
Medium |
841 |
String Replace |
|
Hard |
842 |
Origami |
|
Medium |
843 |
Digital Flip |
JavaScript |
Medium |
844 |
Number Pair Statistics |
|
Easy |
845 |
Greatest Common Divisor |
JavaScript |
Easy |
846 |
Multi-keyword Sort |
JavaScript |
Easy |
847 |
Split BST |
|
Medium |
848 |
Minimize Max Distance to Gas Station |
|
Hard |
849 |
Basic Calculator III |
|
Hard |
850 |
Employee Free Time |
|
Hard |
851 |
Pour Water |
|
Medium |
852 |
IP to CIDR |
|
Easy |
853 |
Number Of Corner Rectangles |
|
Medium |
854 |
Closest Leaf in a Binary Tree |
JavaScript |
Medium |
855 |
Sentence Similarity II |
|
Medium |
856 |
Sentence Similarity |
JavaScript |
Easy |
857 |
Minimum Window Subsequence |
|
Hard |
858 |
Candy Crush |
|
Medium |
859 |
Max Stack |
Python |
Hard |
860 |
Number of Distinct Islands |
|
Medium |
861 |
K Empty Slots |
|
Hard |
862 |
Next Closest Time |
TypeScript |
Medium |
863 |
Binary Tree Path Sum IV |
TypeScript |
Medium |
864 |
Equal Tree Partition |
JavaScript |
Medium |
865 |
Remove 9 |
|
Hard |
866 |
Coin Path |
|
Hard |
867 |
4 Keys Keyboard |
|
Medium |
868 |
Maximum Average Subarray |
JavaScript |
Easy |
869 |
Find the Derangement of An Array |
|
Medium |
871 |
Minimum Factorization |
|
Medium |
872 |
Kill Process |
Python |
Medium |
873 |
Squirrel Simulation |
|
Medium |
874 |
Maximum Vacation Days |
|
Hard |
875 |
Longest Line of Consecutive One in Matrix |
JavaScript |
Medium |
876 |
Split Concatenated Strings |
|
Medium |
877 |
Split Array with Equal Sum |
|
Medium |
878 |
Boundary of Binary Tree |
|
Medium |
879 |
Output Contest Matches |
|
Medium |
880 |
Construct Binary Tree from String |
JavaScript |
Medium |
881 |
Lonely Pixel II |
|
Medium |
882 |
Lonely Pixel |
TypeScript |
Medium |
883 |
Max Consecutive Ones II |
JavaScript |
Medium |
884 |
Find Permutation |
|
Medium |
885 |
Encode String with Shortest Length |
|
Hard |
886 |
Convex Polygon |
|
Medium |
887 |
Ternary Expression Parser |
|
Medium |
888 |
Valid Word Square |
JavaScript |
Easy |
889 |
Sentence Screen Fitting |
|
Medium |
890 |
Minimum Unique Word Abbreviation |
|
Hard |
891 |
Valid Palindrome II |
JavaScript |
Medium |
892 |
Alien Dictionary |
JavaScript |
Hard |
893 |
Longest Palindromic Substring II |
|
Hard |
894 |
Pancake Sorting |
|
Medium |
895 |
Friend Request |
|
Easy |
896 |
Prime Product |
|
Medium |
897 |
Island City |
|
Medium |
898 |
Leftmost One |
|
Medium |
900 |
Closest Binary Search Tree Value |
JavaScript |
Easy |
901 |
Closest Binary Search Tree Value II |
|
Hard |
902 |
Kth Smallest Element in a BST |
JavaScript |
Medium |
903 |
Range Addition |
TypeScript |
Medium |
904 |
Plus One Linked List |
JavaScript |
Medium |
905 |
Nested List Weight Sum II |
|
Medium |
906 |
Sort Transformed Array |
JavaScript |
Medium |
907 |
Rearrange String k Distance Apart |
|
Hard |
908 |
Line Reflection |
JavaScript |
Medium |
909 |
Android Unlock Patterns |
|
Medium |
910 |
Largest BST Subtree |
|
Medium |
911 |
Maximum Size Subarray Sum Equals k |
JavaScript |
Medium |
912 |
Best Meeting Point |
|
Hard |
913 |
Flip Game II |
|
Medium |
914 |
Flip Game |
JavaScript |
Easy |
915 |
Inorder Predecessor in BST |
Java |
Medium |
916 |
Palindrome Permutation |
JavaScript |
Easy |
917 |
Palindrome Permutation II |
|
Medium |
918 |
3Sum Smaller |
JavaScript |
Medium |
919 |
Meeting Rooms II |
|
Medium |
920 |
Meeting Rooms |
JavaScript |
Easy |
921 |
Count Univalue Subtrees |
TypeScript |
Medium |
922 |
Group Shifted Strings |
|
Medium |
923 |
Strobogrammatic Number III |
|
Hard |
924 |
Shortest Word Distance |
JavaScript |
Easy |
925 |
Shortest Word Distance II |
|
Medium |
926 |
Shortest Word Distance III |
|
Medium |
927 |
Reverse Words in a String II |
JavaScript |
Medium |
928 |
Longest Substring with At Most Two Distinct Characters |
|
Medium |
930 |
Connected Components in List |
|
Medium |
931 |
Median of K Sorted Arrays |
|
Hard |
932 |
Friends Within Three Jumps |
|
Medium |
933 |
Tuple Multiply |
|
Medium |
934 |
Unlock Problem |
|
Medium |
935 |
Cartesian Product |
|
Medium |
936 |
Capitalizes The First Letter |
JavaScript |
Easy |
937 |
How Many Problem Can I Accept |
TypeScript |
Medium |
939 |
Binary Tree Kth Floor Node |
|
Medium |
940 |
Maximum Absolute Value |
|
Medium |
941 |
Sliding Puzzle |
|
Hard |
943 |
Range Sum Query - Immutable |
Python |
Easy |
944 |
Maximum Submatrix |
|
Medium |
945 |
Task Scheduler |
|
Medium |
946 |
233 Matrix |
|
Super |
947 |
Matrix Power Series |
|
Hard |
948 |
Sequence Count |
|
Super |
949 |
Fibonacci II |
|
Medium |
950 |
Sliding Puzzle III |
|
Hard |
951 |
Rearrange |
|
Easy |
952 |
Digital Problem |
|
Easy |
953 |
The Biggest Score On The Tree |
|
Medium |
954 |
Insert Delete GetRandom O(1) - Duplicates allowed |
|
Hard |
955 |
Implement Queue by Circular Array |
Python |
Medium |
956 |
Data Segmentation |
|
Easy |
957 |
Radar Detection |
|
Easy |
958 |
Palindrome Data Stream |
|
Easy |
959 |
K Spaced Array Sorting |
|
Medium |
960 |
First Unique Number in Data Stream II |
Python |
Medium |
961 |
Design Log Storage System |
|
Medium |
962 |
Condition string |
|
Medium |
963 |
The Judges Give Problem |
|
Medium |
964 |
Food Set |
TypeScript |
Medium |
965 |
LR String |
|
Medium |
966 |
Closest Pair of Points |
|
Hard |
967 |
Quality Inspection |
|
Hard |
968 |
Valid Currency Amount |
|
Medium |
969 |
Longest Repeating Substring II |
|
Medium |
970 |
Big Business |
|
Easy |
971 |
Surplus Value Backpack |
|
Hard |
972 |
Deliver The Message |
|
Medium |
973 |
1-bit and 2-bit Characters |
JavaScript |
Easy |
974 |
01 Matrix |
JavaScript |
Medium |
975 |
2 Keys Keyboard |
|
Medium |
976 |
4Sum II |
JavaScript |
Medium |
977 |
Base 7 |
JavaScript |
Easy |
978 |
Basic Calculator |
|
Medium |
979 |
Additive Number |
TypeScript |
Medium |
980 |
Basic Calculator II |
|
Medium |
981 |
Basic Calculator IV |
|
Hard |
982 |
Arithmetic Slices |
JavaScript |
Medium |
983 |
Baseball Game |
JavaScript |
Easy |
984 |
Arithmetic Slices II - Subsequence |
|
Hard |
985 |
Can I Win |
|
Hard |
986 |
Battleships in a Board |
Python |
Medium |
987 |
Binary Number with Alternating Bits |
JavaScript |
Easy |
988 |
Arranging Coins |
JavaScript |
Easy |
989 |
Array Nesting |
TypeScript |
Medium |
990 |
Beautiful Arrangement |
|
Medium |
991 |
Bulb Switcher |
|
Medium |
992 |
Beautiful Arrangement II |
|
Medium |
993 |
Array Partition I |
JavaScript |
Easy |
994 |
Contiguous Array |
JavaScript |
Medium |
995 |
Best Time to Buy and Sell Stock with Cooldown |
JavaScript |
Medium |
996 |
Maximum Slope Straight Line |
|
Medium |
997 |
Print Organization Chart |
|
Medium |
998 |
Construction Queue |
|
Hard |
999 |
implement-deque-by-circular-array |
|
Medium |
1000 |
Best Time to Buy and Sell Stock with Transaction Fee |
JavaScript |
Medium |
1001 |
Asteroid Collision |
JavaScript |
Medium |
1002 |
Bus Routes |
|
Medium |
1003 |
Binary Tree Pruning |
JavaScript |
Easy |
1004 |
Largest Sum of Averages |
JavaScript |
Medium |
1005 |
Largest Triangle Area |
JavaScript |
Easy |
1006 |
Subdomain Visit Count |
JavaScript |
Easy |
1007 |
Chalkboard XOR Game |
|
Medium |
1008 |
Expressive Words |
|
Medium |
1009 |
Soup Servings |
|
Medium |
1010 |
Max Increase to Keep City Skyline |
JavaScript |
Medium |
1011 |
Number of Lines To Write String |
JavaScript |
Easy |
1012 |
Split Array With Same Average |
|
Hard |
1013 |
Unique Morse Code Words |
JavaScript |
Easy |
1014 |
Bricks Falling When Hit |
|
Hard |
1015 |
Find Eventual Safe States |
|
Medium |
1016 |
Minimum Swaps To Make Sequences Increasing |
|
Medium |
1017 |
Similar RGB Color |
JavaScript |
Easy |
1018 |
Champagne Tower |
JavaScript |
Medium |
1019 |
Smallest Rotation with Highest Score |
|
Hard |
1020 |
All Paths From Source to Target |
TypeScript |
Medium |
1021 |
Number of Subarrays with Bounded Maximum |
|
Medium |
1022 |
Valid Tic-Tac-Toe State |
JavaScript |
Medium |
1023 |
Preimage Size of Factorial Zeroes Function |
TypeScript |
Hard |
1024 |
Number of Matching Subsequences |
|
Medium |
1025 |
Custom Sort String |
|
Medium |
1026 |
Domino and Tromino Tiling |
|
Medium |
1027 |
Escape The Ghosts |
JavaScript |
Medium |
1028 |
Rotated Digits |
TypeScript |
Easy |
1029 |
Cheapest Flights Within K Stops |
|
Medium |
1030 |
K-th Smallest Prime Fraction |
|
Hard |
1031 |
Is Graph Bipartite? |
TypeScript |
Medium |
1032 |
Letter Case Permutation |
JavaScript |
Easy |
1033 |
Minimum Difference Between BST Nodes |
JavaScript |
Easy |
1034 |
Transform to Chessboard |
|
Hard |
1035 |
Rabbits in Forest |
JavaScript |
Medium |
1036 |
Reach Points |
|
Hard |
1037 |
Global and Local Inversions |
|
Medium |
1038 |
Jewels And Stones |
JavaScript |
Easy |
1039 |
Max Chunks To Make Sorted |
TypeScript |
Medium |
1040 |
Max Chunks To Make Sorted II |
|
Hard |
1041 |
Reorganize String |
JavaScript |
Medium |
1042 |
Toeplitz Matrix |
JavaScript |
Easy |
1043 |
Couples Holding Hands |
|
Hard |
1044 |
Largest Plus Sign |
TypeScript |
Medium |
1045 |
Partition Labels |
|
Medium |
1046 |
Prime Number of Set Bits in Binary Representation |
TypeScript |
Easy |
1047 |
Special Binary String |
|
Medium |
1048 |
Set Intersection Size At Least Two |
|
Hard |
1049 |
Pyramid Transition Matrix |
|
Medium |
1050 |
Cracking the Safe |
|
Hard |
1051 |
Contain Virus |
|
Hard |
1052 |
Shortest Completing Word |
|
Medium |
1053 |
Largest Number At Least Twice of Others |
JavaScript |
Easy |
1054 |
Min Cost Climbing Stairs |
JavaScript |
Easy |
1056 |
Find Smallest Letter Greater Than Target |
JavaScript |
Easy |
1057 |
Network Delay Time |
|
Medium |
1058 |
Cherry Pickup |
|
Hard |
1059 |
Delete and Earn |
JavaScript |
Medium |
1060 |
Daily Temperatures |
Python |
Medium |
1061 |
Parse Lisp Expression |
|
Hard |
1062 |
Flood Fill |
JavaScript |
Easy |
1063 |
My Calendar III |
|
Hard |
1064 |
My Calendar II |
|
Medium |
1065 |
My Calendar I |
|
Medium |
1066 |
Verify Preorder Serialization of a Binary Tree |
JavaScript |
Medium |
1067 |
Split Array in Parts |
|
Medium |
1068 |
Find Pivot Index |
JavaScript |
Easy |
1069 |
Remove Comments |
|
Medium |
1070 |
Accounts Merge |
|
Medium |
1071 |
Longest Word in Dictionary |
TypeScript |
Easy |
1072 |
Find K-th Smallest Pair Distance |
|
Hard |
1073 |
Maximum Length of Repeated Subarray |
|
Medium |
1074 |
Range Module |
|
Hard |
1075 |
Subarray Product Less Than K |
|
Medium |
1076 |
Minimum ASCII Delete Sum for Two Strings |
JavaScript |
Medium |
1077 |
Falling Squares |
|
Hard |
1078 |
Degree of an Array |
TypeScript |
Easy |
1079 |
Count Binary Substrings |
TypeScript |
Easy |
1080 |
Max Area of Island |
JavaScript |
Easy |
1081 |
Stickers to Spell Word |
|
Hard |
1082 |
Employee Importance |
Python |
Easy |
1083 |
Maximum Sum of 3 Non-Overlapping Subarrays |
|
Hard |
1084 |
Knight Probability in Chessboard |
|
Medium |
1085 |
Longest Univalue Path |
JavaScript |
Easy |
1086 |
Repeated String Match |
TypeScript |
Easy |
1087 |
Redundant Connection II |
|
Hard |
1088 |
Redundant Connection |
|
Medium |
1089 |
Valid Parenthesis String |
JavaScript |
Medium |
1090 |
Map Sum Pairs |
|
Medium |
1092 |
Cut Off Trees for Golf Event |
|
Hard |
1093 |
Number of Longest Increasing Subsequence |
JavaScript |
Medium |
1094 |
Second Minimum Node In a Binary Tree |
JavaScript |
Easy |
1095 |
Maximum Swap |
JavaScript |
Medium |
1096 |
Greatest Least Common Multiple |
|
Medium |
1097 |
Kth Smallest Number in Multiplication Table |
|
Hard |
1098 |
Path Sum IV |
TypeScript |
Medium |
1099 |
Non-decreasing Array |
JavaScript |
Easy |
1100 |
Strange Printer |
|
Hard |
1101 |
Maximum Width of Binary Tree |
JavaScript |
Medium |
1102 |
Image Smoother |
TypeScript |
Easy |
1103 |
Split Array into Consecutive Subsequences |
|
Medium |
1104 |
Judge Route Circle |
TypeScript |
Easy |
1105 |
Print Binary Tree |
JavaScript |
Medium |
1106 |
Maximum Binary Tree |
JavaScript |
Easy |
1109 |
Dota2 Senate |
|
Medium |
1110 |
Replace Words |
TypeScript |
Medium |
1111 |
Maximum Length of Pair Chain |
|
Medium |
1112 |
Set Mismatch |
JavaScript |
Easy |
1113 |
Solve the Equation |
|
Medium |
1114 |
Shopping Offers |
|
Medium |
1115 |
Average of Levels in Binary Tree |
JavaScript |
Easy |
1116 |
Exclusive Time of Functions |
|
Medium |
1117 |
Smallest Range |
|
Hard |
1118 |
K Inverse Pairs Array |
|
Hard |
1122 |
Add One Row to Tree |
JavaScript |
Medium |
1125 |
Jump Pillar |
|
Medium |
1126 |
Merge Two Binary Trees |
JavaScript |
Easy |
1127 |
Add Bold Tag in String |
|
Medium |
1129 |
Smallest Subtree with All the Deepest Nodes |
TypeScript |
Medium |
1130 |
Magic circle |
|
Hard |
1131 |
The Function in Permutations |
|
Medium |
1132 |
Valid Triangle Number |
TypeScript |
Medium |
1133 |
Group Buy |
TypeScript |
Easy |
1134 |
Find Duplicate File in System |
JavaScript |
Medium |
1135 |
Feature extraction |
|
Easy |
1136 |
High Click Induction Area |
TypeScript |
Medium |
1137 |
Construct String from Binary Tree |
JavaScript |
Easy |
1138 |
Can Place Flowers |
JavaScript |
Easy |
1139 |
the kth subarray |
|
Hard |
1141 |
The month's days |
TypeScript |
Easy |
1142 |
Non-negative Integers without Consecutive Ones |
|
Hard |
1143 |
Minimum Index Sum of Two Lists |
JavaScript |
Easy |
1144 |
Range Addition II |
TypeScript |
Easy |
1145 |
Associated query |
|
Easy |
1146 |
Chess piece rotation |
|
Easy |
1147 |
Work Plan |
|
Medium |
1148 |
Longest Harmonious Subsequence |
TypeScript |
Easy |
1149 |
Valid Square |
JavaScript |
Medium |
1150 |
Fraction Addition and Subtraction |
|
Medium |
1151 |
Tag Validator |
|
Hard |
1152 |
Erect the Fence |
|
Hard |
1153 |
string sorting |
TypeScript |
Easy |
1154 |
Attendance Judgment |
TypeScript |
Easy |
1156 |
Delete Operation for Two Strings |
JavaScript |
Medium |
1157 |
Shortest Unsorted Continuous Subarray |
TypeScript |
Easy |
1158 |
Plant flowers |
|
Medium |
1159 |
Longest Common Prefix III |
|
Hard |
1160 |
Campus Bikes |
|
Medium |
1161 |
goods transfer |
|
Hard |
1162 |
Out of Boundary Paths |
|
Medium |
1163 |
Distribute Candies |
JavaScript |
Easy |
1164 |
Wiggle Subsequence |
|
Medium |
1165 |
Subtree of Another Tree |
JavaScript |
Easy |
1166 |
Recommended Results are Scattered |
TypeScript |
Easy |
1167 |
Top three numbers |
|
Medium |
1168 |
array score |
TypeScript |
Easy |
1169 |
Permutation in String |
JavaScript |
Medium |
1170 |
Reshape the Matrix |
JavaScript |
Easy |
1171 |
Find the Closest Palindrome |
|
Hard |
1172 |
Binary Tree Tilt |
JavaScript |
Easy |
1173 |
Reverse Words in a String III |
JavaScript |
Easy |
1174 |
Next Greater Element III |
|
Medium |
1175 |
Brick Wall |
|
Medium |
1176 |
Optimal Division |
|
Medium |
1177 |
Student Attendance Record II |
|
Hard |
1178 |
Student Attendance Record I |
JavaScript |
Easy |
1179 |
Friend Circles |
|
Medium |
1180 |
Remove Boxes |
|
Hard |
1181 |
Diameter of Binary Tree |
JavaScript |
Easy |
1182 |
Reverse String II |
JavaScript |
Easy |
1183 |
Single Element in a Sorted Array |
JavaScript |
Medium |
1184 |
Minimum Time Difference |
JavaScript |
Medium |
1185 |
Complex Number Multiplication |
JavaScript |
Medium |
1186 |
Encode and Decode TinyURL |
Python |
Medium |
1187 |
K-diff Pairs in an Array |
JavaScript |
Easy |
1188 |
Minimum Absolute Difference in BST |
JavaScript |
Easy |
1189 |
Minesweeper |
Python |
Medium |
1190 |
Longest Word in Dictionary through Deleting |
|
Medium |
1191 |
Longest Uncommon Subsequence II |
|
Medium |
1192 |
Longest Uncommon Subsequence I |
TypeScript |
Easy |
1193 |
Detect Capital |
JavaScript |
Easy |
1194 |
Super Washing Machines |
|
Hard |
1195 |
Find Largest Value in Each Tree Row |
JavaScript |
Medium |
1196 |
Freedom Trail |
|
Hard |
1197 |
Find Bottom Left Tree Value |
JavaScript |
Medium |
1198 |
Most Frequent Subtree Sum |
TypeScript |
Medium |
1199 |
Perfect Number |
TypeScript |
Easy |
1200 |
Relative Ranks |
JavaScript |
Easy |
1201 |
Next Greater Element II |
|
Medium |
1202 |
IPO |
TypeScript |
Hard |
1203 |
Find Mode in Binary Search Tree |
JavaScript |
Medium |
1204 |
Keyboard Row |
JavaScript |
Easy |
1205 |
Diagonal Traverse |
JavaScript |
Medium |
1206 |
Next Greater Element I |
TypeScript |
Easy |
1207 |
Teemo Attacking |
|
Medium |
1208 |
Target Sum |
JavaScript |
Medium |
1209 |
Construct the Rectangle |
JavaScript |
Easy |
1210 |
Increasing Subsequences |
|
Medium |
1211 |
Zuma Game |
|
Hard |
1212 |
Max Consecutive Ones |
JavaScript |
Easy |
1213 |
Smallest Good Base |
|
Hard |
1214 |
License Key Formatting |
JavaScript |
Easy |
1215 |
Magical String |
TypeScript |
Medium |
1216 |
Largest Palindrome Product |
TypeScript |
Easy |
1217 |
Total Hamming Distance |
TypeScript |
Medium |
1218 |
Number Complement |
JavaScript |
Easy |
1219 |
Heaters |
TypeScript |
Medium |
1220 |
Matchsticks to Square |
TypeScript |
Medium |
1221 |
Concatenated Words |
|
Hard |
1222 |
Validate IP Address |
TypeScript |
Medium |
1223 |
Unique Substrings in Wraparound String |
|
Medium |
1224 |
Count The Repetitions |
|
Hard |
1225 |
Island Perimeter |
TypeScript |
Easy |
1226 |
Minimum Moves to Equal Array Elements II |
TypeScript |
Medium |
1227 |
Repeated Substring Pattern |
JavaScript |
Easy |
1228 |
Poor Pigs |
|
Easy |
1229 |
Circular Array Loop |
|
Medium |
1230 |
Assign Cookies |
JavaScript |
Easy |
1231 |
Minimum Moves to Equal Array Elements |
|
Easy |
1232 |
Minimum Number of Arrows to Burst Balloons |
|
Medium |
1233 |
Sort Characters By Frequency |
TypeScript |
Medium |
1234 |
Delete Node in a BST |
|
Medium |
1235 |
Serialize and Deserialize BST |
Python |
Medium |
1236 |
Find All Numbers Disappeared in an Array |
JavaScript |
Easy |
1237 |
Number of Boomerangs |
JavaScript |
Easy |
1238 |
Find All Duplicates in an Array |
Python |
Medium |
1239 |
K-th Smallest in Lexicographical Order |
|
Hard |
1240 |
Path Sum III |
|
Easy |
1241 |
Find Right Interval |
|
Medium |
1242 |
Non-overlapping Intervals |
|
Medium |
1243 |
Number of Segments in a String |
JavaScript |
Easy |
1244 |
Minimum Genetic Mutation |
|
Medium |
1245 |
All O(1) Data Structure |
|
Hard |
1246 |
Longest Repeating Character Replacement |
|
Medium |
1247 |
Reconstruct Original Digits from English |
TypeScript |
Medium |
1248 |
Maximum XOR of Two Numbers in an Array |
|
Medium |
1249 |
Strong Password Checker |
|
Hard |
1250 |
Third Maximum Number |
JavaScript |
Easy |
1251 |
Split Array Largest Sum |
JavaScript |
Hard |
1252 |
Queue Reconstruction by Height |
|
Medium |
1253 |
Convert a Number to Hexadecimal |
JavaScript |
Easy |
1254 |
Sum of Left Leaves |
JavaScript |
Easy |
1255 |
Remove K Digits |
|
Medium |
1256 |
Nth Digit |
|
Easy |
1257 |
Evaluate Division |
|
Medium |
1258 |
Beautiful Subarrays |
|
Medium |
1259 |
Integer Replacement |
TypeScript |
Medium |
1260 |
Rotate Function |
|
Medium |
1261 |
Longest Substring with At Least K Repeating Characters |
|
Medium |
1262 |
UTF-8 Validation |
TypeScript |
Medium |
1263 |
Is Subsequence |
JavaScript |
Medium |
1264 |
Perfect Rectangle |
|
Hard |
1265 |
Elimination Game |
|
Medium |
1266 |
Find the Difference |
JavaScript |
Easy |
1267 |
Lexicographical Numbers |
JavaScript |
Medium |
1269 |
Handkerchief Throwing |
|
Medium |
1270 |
Ransom Note |
JavaScript |
Easy |
1271 |
Critical Connections in a Network |
|
Hard |
1272 |
Kth Smallest Element in a Sorted Matrix |
JavaScript |
Medium |
1273 |
Maximum Length of Increasing String |
|
Hard |
1274 |
Find K Pairs with Smallest Sums |
|
Medium |
1275 |
Super Pow |
JavaScript |
Medium |
1276 |
Sum of Two Integers |
|
Easy |
1277 |
Water and Jug Problem |
|
Medium |
1278 |
Max Sum of Rectangle No Larger Than K |
|
Hard |
1279 |
Count Numbers with Unique Digits |
|
Medium |
1280 |
Data Stream as Disjoint Intervals |
|
Hard |
1281 |
Top K Frequent Elements |
Python |
Medium |
1282 |
Reverse Vowels of a String |
JavaScript |
Easy |
1283 |
Reverse String |
JavaScript |
Easy |
1284 |
Integer Break |
JavaScript |
Medium |
1285 |
Power of Four |
JavaScript |
Easy |
1286 |
Self Crossing |
|
Hard |
1287 |
Increasing Triplet Subsequence |
JavaScript |
Medium |
1288 |
Reconstruct Itinerary |
|
Medium |
1289 |
Number of Atoms |
|
Hard |
1290 |
Patching Array |
|
Hard |
1291 |
Sports Meeting |
|
Medium |
1292 |
Odd Even Linked List |
JavaScript |
Medium |
1293 |
Count of Range Sum |
|
Hard |
1294 |
Power of Three |
JavaScript |
Easy |
1295 |
Prime Factor Statistics |
|
Easy |
1296 |
Maximum Product of Word Lengths |
TypeScript |
Medium |
1297 |
Count of Smaller Numbers After Self |
TypeScript |
Hard |
1298 |
Minimum Height Trees |
|
Medium |
1299 |
Bulls and Cows |
TypeScript |
Medium |
1300 |
Bash Game |
JavaScript |
Easy |
1301 |
Game of Life |
|
Medium |
1302 |
People Counting |
|
Easy |
1303 |
H-Index II |
JavaScript |
Medium |
1304 |
H-Index |
|
Medium |
1306 |
Travel Plan II |
|
Hard |
1307 |
Verify Preorder Sequence in Binary Search Tree |
JavaScript |
Medium |
1308 |
Factor Combinations |
|
Medium |
1309 |
Different Ways to Add Parentheses |
|
Medium |
1310 |
Product of Array Except Self |
JavaScript |
Medium |
1311 |
Lowest Common Ancestor of a Binary Search Tree |
Python |
Easy |
1312 |
Number of Digit One |
JavaScript |
Hard |
1313 |
Bipartite Graph |
|
Medium |
1314 |
Power of Two |
JavaScript |
Easy |
1315 |
Summary Ranges |
|
Medium |
1316 |
Luck Number |
|
Hard |
1317 |
Count Complete Tree Nodes |
JavaScript |
Medium |
1318 |
Contains Duplicate III |
|
Medium |
1319 |
Contains Duplicate II |
JavaScript |
Easy |
1320 |
Contains Duplicate |
JavaScript |
Easy |
1321 |
Combination Sum III |
|
Medium |
1322 |
Product Equal B |
|
Hard |
1323 |
Fetch supplies |
|
Medium |
1324 |
Count Primes |
JavaScript |
Easy |
1325 |
Bitwise AND of Numbers Range |
TypeScript |
Medium |
1326 |
Boarder Sort |
TypeScript |
Medium |
1327 |
delete string |
|
Easy |
1328 |
Double Change |
|
Easy |
1329 |
Sequence maintenance |
|
Hard |
1330 |
zero matrix |
|
Hard |
1331 |
English Software |
TypeScript |
Easy |
1332 |
Number of 1 Bits |
JavaScript |
Easy |
1333 |
Reverse Bits |
JavaScript Python |
Easy |
1334 |
Rotate Array |
JavaScript |
Easy |
1335 |
Repeated DNA Sequences |
JavaScript |
Medium |
1336 |
Party Invitation |
|
Medium |
1337 |
Maximum possible value |
|
Medium |
1338 |
Parking Dilemma |
TypeScript |
Easy |
1339 |
Maximum Range |
|
Hard |
1340 |
add character |
|
Easy |
1341 |
Combine New Numbers |
|
Medium |
1342 |
substitute string |
|
Medium |
1343 |
Sum of Two Strings |
Python |
Easy |
1344 |
Counter Diagonal Sort |
TypeScript |
Medium |
1345 |
Robot Encircular |
|
Medium |
1346 |
Dungeon Game |
|
Hard |
1347 |
Factorial Trailing Zeroes |
JavaScript |
Easy |
1348 |
Excel Sheet Column Number |
JavaScript |
Easy |
1350 |
Excel Sheet Column Title |
JavaScript |
Easy |
1351 |
Fraction to Recurring Decimal |
|
Medium |
1352 |
Compare Version Numbers |
JavaScript |
Medium |
1353 |
Sum Root to Leaf Numbers |
JavaScript |
Medium |
1354 |
Pascal's Triangle II |
JavaScript |
Easy |
1355 |
Pascal's Triangle |
JavaScript |
Easy |
1356 |
Maximum Points Set |
|
Medium |
1357 |
Path Sum II |
JavaScript |
Medium |
1358 |
Path Sum |
JavaScript |
Easy |
1359 |
Convert Sorted Array to Binary Search Tree |
JavaScript |
Easy |
1360 |
Symmetric Tree |
JavaScript |
Medium |
1361 |
Text Justification |
|
Hard |
1362 |
Substring with Concatenation of All Words |
|
Hard |
1363 |
ZigZag Conversion |
TypeScript |
Medium |
1364 |
the minium distance |
|
Medium |
1365 |
Minimum Cycle Section |
|
Hard |
1366 |
Directed Graph Loop |
|
Medium |
1367 |
Police Distance |
|
Medium |
1368 |
Same Number |
JavaScript |
Easy |
1369 |
Most Common Word |
TypeScript |
Easy |
1370 |
Race Car |
|
Hard |
1371 |
Linked List Components |
JavaScript |
Medium |
1372 |
Ambiguous Coordinates |
TypeScript |
Medium |
1373 |
Movies on Flight |
|
Medium |
1374 |
Shortest Distance in 3D Space |
|
Medium |
1375 |
Substring With At Least K Distinct Characters |
|
Medium |
1376 |
Equivalent Strings |
|
Medium |
1377 |
Find Substring |
|
Medium |
1378 |
Minimum String Array Coverage |
|
Medium |
1379 |
The Longest Scene |
|
Hard |
1380 |
Log Sorting |
|
Easy |
1381 |
Maximum Line Coverage |
|
Hard |
1382 |
High Capacity Backpack |
|
Hard |
1383 |
Subtree Count |
|
Hard |
1384 |
Segment Stones Merge |
|
Super |
1385 |
Lucky Number Eight |
|
Easy |
1386 |
Cable Car Ride |
|
Easy |
1387 |
Binary Trees With Factors |
|
Medium |
1388 |
Card Flipping Game |
|
Medium |
1389 |
Shortest Distance to a Character |
|
Easy |
1390 |
Short Encoding of Words |
|
Medium |
1391 |
Making A Large Island |
|
Hard |
1392 |
Most Profit Assigning Work |
|
Medium |
1393 |
Friends Of Appropriate Ages |
TypeScript |
Medium |
1394 |
Goat Latin |
JavaScript |
Easy |
1395 |
The Barycentre Of The Trees |
|
Hard |
1396 |
Set Union |
|
Medium |
1397 |
Digital Coverage |
|
Medium |
1398 |
K Decimal Addition |
|
Easy |
1399 |
Take Coins |
|
Medium |
1400 |
Fermat Point Of Graphs |
|
Hard |
1401 |
Twitch Words |
JavaScript |
Easy |
1402 |
Recommend Friends |
|
Medium |
1403 |
Maximum Product Path |
|
Medium |
1408 |
Gas Station II |
|
Hard |
1409 |
Matrix Finding Number |
|
Medium |
1410 |
Matrix Water Injection |
|
Medium |
1411 |
Edit Distance - Replace Edition |
|
Medium |
1412 |
Pick Three Numbers |
|
Medium |
1413 |
Tree |
|
Medium |
1414 |
Eat The Beans |
|
Hard |
1415 |
Residual Product |
|
Easy |
1416 |
The Previous Number |
|
Medium |
1417 |
Weighing Problem |
|
Easy |
1418 |
Path With Maximum Minimum Value |
|
Medium |
1420 |
Minimum Window Substring II |
|
Medium |
1421 |
Matrix Game |
|
Easy |
1422 |
Shortest Path Visiting All Nodes |
|
Hard |
1423 |
Hand of Straights |
|
Medium |
1424 |
Longest Mountain in Array |
JavaScript |
Medium |
1425 |
Backspace String Compare |
JavaScript |
Easy |
1426 |
Robot jumping |
|
Hard |
1427 |
Split Array into Fibonacci Sequence |
|
Medium |
1428 |
Keys and Rooms |
|
Medium |
1430 |
Similar String Groups |
|
Hard |
1431 |
Push Dominoes |
|
Medium |
1432 |
New 21 Game |
|
Medium |
1433 |
Image Overlap |
|
Medium |
1434 |
Sum of Distances in Tree |
|
Hard |
1435 |
Find And Replace in String |
|
Medium |
1436 |
Flipping an Image |
|
Easy |
1437 |
Masking Personal Information |
TypeScript |
Medium |
1438 |
Positions of Large Groups |
JavaScript |
Easy |
1439 |
Consecutive Numbers Sum |
TypeScript |
Medium |
1440 |
Unique Letter String |
|
Hard |
1441 |
Four Numbers Multiply Problem |
|
Hard |
1442 |
Order Problem |
|
Medium |
1443 |
Longest AB Substring |
|
Easy |
1444 |
Dyeing Problem |
|
Medium |
1446 |
01 Matrix Walking Problem |
|
Medium |
1447 |
Calculation The Sum Of Path |
|
Medium |
1448 |
Card Game |
|
Medium |
1449 |
Loud and Rich |
|
Medium |
1450 |
Rectangle Area II |
|
Hard |
1451 |
Maximize Distance to Closest Person |
JavaScript |
Easy |
1452 |
Shifting Letters |
|
Medium |
1453 |
Minimum Amount |
|
Medium |
1454 |
Word Frequency Count |
|
Medium |
1455 |
Valid Array |
|
Easy |
1456 |
Word Synthesis Problem |
|
Hard |
1457 |
Search Subarray |
TypeScript |
Medium |
1458 |
Minimum Submatrix |
|
Medium |
1459 |
Judge the last number |
|
Easy |
1463 |
Paper Review |
|
Medium |
1464 |
The K-th Combination |
|
Hard |
1465 |
Order Of Tasks |
|
Medium |
1466 |
Best Shopping Plan |
|
Medium |
1467 |
Ask For Cooling Time |
|
Medium |
1468 |
Two Numbers That Are Not Repeated |
|
Hard |
1469 |
Longest Path On The Tree |
|
Medium |
1470 |
The Game Of Take Numbers |
|
Medium |
1471 |
Set Operation |
|
Easy |
1472 |
Twins Strings |
|
Easy |
1473 |
Find The Sum Of The Array |
|
Medium |
1474 |
Shortest Phrase |
|
Medium |
1475 |
Minimum Legal Bracket Sequence |
|
Hard |
1476 |
Peak Index in a Mountain Array |
TypeScript |
Easy |
1477 |
Car Fleet |
JavaScript |
Medium |
1478 |
Closest Target Value |
|
Easy |
1479 |
Can Reach The Endpoint |
|
Easy |
1480 |
Dot Product |
|
Easy |
1481 |
Unique Substring |
|
Medium |
1482 |
Minimum Sum Path |
|
Medium |
1483 |
Maximum Average Score |
JavaScript |
Easy |
1484 |
The Most Frequent word |
|
Medium |
1486 |
Function Runtime |
|
Easy |
1487 |
Judging Triangle |
|
Medium |
1489 |
The Largest Sum Of The Matrix Boundary Elements |
|
Medium |
1490 |
K-Similar Strings |
|
Hard |
1491 |
Score of Parentheses |
|
Medium |
1492 |
Koko Eating Bananas |
JavaScript |
Medium |
1493 |
Walking Robot Simulation |
|
Easy |
1494 |
Length of Longest Fibonacci Subsequence |
|
Medium |
1495 |
Leaf-Similar Trees |
JavaScript |
Easy |
1496 |
Implement Rand10() Using Rand7() |
Python |
Medium |
1497 |
Minimum Number of Refueling Stops |
|
Hard |
1498 |
Advantage Shuffle |
|
Medium |
1499 |
Reordered Power of 2 |
JavaScript |
Medium |
1500 |
Binary Gap |
|
Easy |
1501 |
Transpose Matrix |
|
Easy |
1502 |
Prime Palindrome |
|
Medium |
1503 |
Give change |
|
Easy |
1504 |
Shortest Path to Get All Keys |
|
Hard |
1505 |
Find the Number |
Python |
Easy |
1506 |
All Nodes Distance K in Binary Tree |
Python |
Medium |
1507 |
Shortest Subarray with Sum at Least K |
|
Hard |
1508 |
Score After Flipping Matrix |
JavaScript |
Medium |
1509 |
Lemonade Change |
JavaScript |
Easy |
1510 |
Buddy Strings |
JavaScript |
Easy |
1511 |
Mirror Reflection |
|
Medium |
1512 |
Minimum Cost to Hire K Workers |
|
Hard |
1513 |
Exam Room |
|
Medium |
1514 |
Robot Room Cleaner |
|
Hard |
1516 |
Xor Sum |
|
Super |
1517 |
Largest subarray |
JavaScript |
Easy |
1518 |
Watering Flowers |
|
Medium |
1521 |
Unique Twitter User Id Set |
|
Easy |
1522 |
Search in a Sorted Array of Unknown Size |
|
Medium |
1523 |
Partitioning Array |
TypeScript |
Easy |
1524 |
Search in a Binary Search Tree |
JavaScript |
Easy |
1525 |
N-ary Tree Postorder Traversal |
Python |
Easy |
1526 |
N-ary Tree Preorder Traversal |
Python |
Easy |
1527 |
Majsoul on ! |
|
Medium |
1528 |
number schemes |
|
Hard |
1529 |
Triplet Subarray With Absolute Diff Less Than or Equal to Limit |
|
Medium |
1530 |
Encode N-ary Tree to Binary Tree |
|
Hard |
1531 |
Automatic Proofreading Program |
|
Medium |
1532 |
Serialize and Deserialize N-ary Tree |
|
Hard |
1533 |
N-ary Tree Level Order Traversal |
TypeScript |
Easy |
1534 |
Convert Binary Search Tree to Sorted Doubly Linked List |
|
Medium |
1535 |
To Lower Case |
JavaScript |
Easy |
1536 |
Find First and Last Position of Element in Sorted Array |
JavaScript |
Medium |
1537 |
Swap Zero-One |
|
Medium |
1538 |
Card Game II |
|
Medium |
1539 |
Flipped the Pixel |
|
Medium |
1540 |
Can Convert |
TypeScript |
Easy |
1541 |
Put Box |
|
Medium |
1542 |
NextTime Norepeat |
|
Medium |
1543 |
Unique Path IV |
|
Medium |
1544 |
Magic Square |
|
Hard |
1545 |
Last Closest Time |
|
Medium |
1546 |
Coin Problem |
|
Easy |
1552 |
Parking Problem |
|
Medium |
1553 |
Climbing Stairs III |
|
Medium |
1554 |
LastTime Norepeat |
|
Medium |
1555 |
Flower Problem |
|
Hard |
1556 |
Guess Game |
|
Hard |
1557 |
Array Maximum Value |
|
Hard |
1558 |
Interlaced Positive And Negative Numbers |
|
Hard |
1559 |
Take the element and query the sum |
|
Easy |
1560 |
MinimumString |
|
Medium |
1561 |
BST Node Distance |
|
Medium |
1562 |
Number of restaurants |
|
Medium |
1563 |
Shortest path to the destination |
|
Medium |
1564 |
Interval Search |
|
Easy |
1565 |
Modern Ludo I |
|
Medium |
1566 |
Minimum Difference |
|
Hard |
1567 |
Maximum Can Exchanged Subarray |
|
Medium |
1568 |
Poison Test |
|
Medium |
1569 |
Social Network |
|
Medium |
1570 |
Binary Stream |
|
Easy |
1571 |
Top K GPA |
|
Medium |
1572 |
Asking For The Longest 01 Substring |
|
Medium |
1573 |
Legal String |
|
Medium |
1574 |
Music Playlist |
|
Hard |
1575 |
Spring Tour |
|
Easy |
1576 |
Optimal Match |
|
Hard |
1577 |
Sum of leaf nodes |
|
Medium |
1578 |
Number of A |
JavaScript |
Medium |
1579 |
Alphabetic string calculation |
|
Medium |
1580 |
Transition String |
|
Medium |
1581 |
Longest Subsequence |
JavaScript |
Medium |
1582 |
Minimum Path Sum II |
|
Medium |
1583 |
Maximum Number Sum |
|
Medium |
1584 |
Number Of Xor Values |
|
Medium |
1585 |
Moving Stones |
|
Easy |
1586 |
Minimum Number Of Keystrokes |
|
Medium |
1587 |
String Segmentation |
TypeScript |
Medium |
1588 |
All Possible Full Binary Trees |
|
Medium |
1589 |
Groups of Special-Equivalent Strings |
|
Easy |
1590 |
Surface Area of 3D Shapes |
|
Easy |
1591 |
Sum of Subsequence Widths |
|
Hard |
1592 |
Find and Replace Pattern |
|
Medium |
1593 |
Construct Binary Tree from Preorder and Postorder Traversal |
JavaScript |
Medium |
1594 |
Fair Candy Swap |
JavaScript |
Easy |
1596 |
Possible Bipartition |
|
Medium |
1597 |
Spiral Matrix III |
|
Medium |
1598 |
Uncommon Words from Two Sentences |
JavaScript |
Easy |
1599 |
Projection Area of 3D Shapes |
|
Easy |
1600 |
Reachable Nodes In Subdivided Graph |
|
Hard |
1601 |
Boats to Save People |
JavaScript |
Medium |
1602 |
Decoded String at Index |
TypeScript |
Medium |
1604 |
Maximum Sum of Two Numbers |
TypeScript |
Medium |
1607 |
Profitable Schemes |
|
Hard |
1608 |
Nth Magical Number |
|
Hard |
1609 |
Middle of the Linked List |
JavaScript |
Easy |
1610 |
Find the numbers |
|
Medium |
1611 |
Shortest subarray |
|
Medium |
1612 |
Smallest Path |
|
Medium |
1613 |
Highest frequency IP |
TypeScript |
Naive |
1614 |
Highest growth stock |
|
Easy |
1615 |
The result of investment |
|
Easy |
1616 |
Shortest subarray II |
|
Hard |
1617 |
Array Maximum Difference |
|
Easy |
1618 |
Processing Form |
|
Medium |
1619 |
Candy II |
|
Medium |
1620 |
Collecting Coins |
|
Super |
1621 |
Cut Connection |
|
Easy |
1623 |
Minimal Distance In The Array |
|
Easy |
1624 |
Max Distance |
|
Hard |
1625 |
Words Compression |
|
Hard |
1626 |
Salary Adjustment |
|
Medium |
1627 |
Word Segmentation |
|
Medium |
1628 |
Driving problem |
|
Medium |
1629 |
Find the nearest store |
|
Medium |
1630 |
Interesting String |
|
Medium |
1631 |
Interesting Subarray |
|
Medium |
1632 |
Count email groups |
|
Easy |
1633 |
Strings That Satisfies The Condition |
|
Easy |
1634 |
Secret Word |
|
Medium |
1635 |
Max Pair |
|
Medium |
1636 |
Aerial Movie |
|
Medium |
1637 |
Tree problem |
|
Medium |
1638 |
Least Substring |
|
Easy |
1639 |
K-Substring with K different characters |
|
Medium |
1640 |
Duplicates Digits |
|
Hard |
1641 |
Max Remove Order |
|
Medium |
1642 |
Query String |
|
Medium |
1643 |
Pick Fruits |
|
Medium |
1644 |
Plane Maximum Rectangle |
|
Medium |
1645 |
Least Subsequences |
|
Medium |
1646 |
CheckWords |
|
Medium |
1647 |
Path Search |
|
Medium |
1648 |
max substring |
|
Hard |
1649 |
Super Lollipop |
TypeScript |
Easy |
1656 |
Legal Number Statistics |
JavaScript |
Easy |
1657 |
Operation Time |
|
Easy |
1659 |
Legal Number Statistics II |
TypeScript |
Easy |
1665 |
Calculate number |
JavaScript |
Easy |
1669 |
Build a temple |
TypeScript |
Medium |
1685 |
The mazeIV |
|
Medium |
1691 |
Best Time to Buy and Sell Stock V |
|
Medium |
1694 |
Monster Hunter |
|
Hard |
1698 |
Delete Columns to Make Sorted |
|
Easy |
1699 |
Find the Shortest Superstring |
|
Hard |
1700 |
DI String Match |
|
Easy |
1701 |
Valid Mountain Array |
|
Easy |
1702 |
Distinct Subsequences II |
JavaScript |
Hard |
1703 |
Minimum Area Rectangle |
|
Medium |
1704 |
Range Sum of BST |
JavaScript |
Medium |
1705 |
Compare Strings II |
|
Easy |
1706 |
Stamping The Sequence |
|
Hard |
1707 |
Knight Dialer |
|
Medium |
1708 |
Shortest Bridge |
|
Medium |
1709 |
Number of Recent Calls |
|
Easy |
1710 |
Beautiful Array |
|
Medium |
1711 |
Minimum Falling Path Sum |
JavaScript |
Medium |
1712 |
Binary Subarrays With Sum |
TypeScript |
Medium |
1713 |
Unique Email Addresses |
|
Easy |
1714 |
Minimize Malware Spread II |
|
Hard |
1715 |
Three Equal Parts |
TypeScript |
Medium |
1716 |
Flip String to Monotone Increasing |
JavaScript |
Medium |
1718 |
Minimize Malware Spread |
|
Hard |
1719 |
3Sum With Multiplicity |
JavaScript |
Medium |
1721 |
Minimum Add to Make Parentheses Valid |
JavaScript |
Medium |
1722 |
Number of Music Playlists |
|
Hard |
1723 |
Shortest Path in a Grid with Obstacles Elimination |
|
Medium |
1724 |
Maximum Sum Circular Subarray |
JavaScript |
Medium |
1725 |
Reverse Only Letters |
|
Easy |
1726 |
Word Subsets |
|
Medium |
1727 |
Partition Array into Disjoint Intervals |
JavaScript |
Medium |
1728 |
X of a Kind in a Deck of Cards |
Python |
Easy |
1729 |
Cat and Mouse |
|
Hard |
1730 |
Spreadsheet Notation Conversion |
|
Easy |
1731 |
Smallest Range II |
|
Medium |
1732 |
Snakes and Ladders |
|
Medium |
1733 |
Smallest Range I |
|
Easy |
1734 |
Sum of Subarray Minimums |
|
Medium |
1735 |
Super Palindromes |
|
Hard |
1736 |
Throw garbage |
|
Medium |
1737 |
Fruit Into Baskets |
|
Medium |
1738 |
Valid Permutations for DI Sequence |
|
Hard |
1739 |
Numbers At Most N Given Digit Set |
|
Medium |
1740 |
Online Stock Span |
|
Medium |
1741 |
RLE Iterator |
|
Medium |
1742 |
Orderly Queue |
|
Hard |
1743 |
Bitwise ORs of Subarrays |
|
Medium |
1744 |
Increasing Order Search Tree |
JavaScript |
Easy |
1745 |
Monotonic Array |
JavaScript |
Easy |
1746 |
Minimum Distance Between BST Nodes |
JavaScript |
Easy |
1747 |
Robot Return to Origin |
|
Easy |
1753 |
Doing Homework |
TypeScript |
Medium |
1756 |
Buy beverage |
|
Medium |
1761 |
Digital Huarong Road |
|
Hard |
1767 |
Minimum Tree Coverage |
|
Hard |
1772 |
Number of collections |
|
Super |
1778 |
Odd Even Jump |
|
Hard |
1779 |
Shortest Duplicate Subarray |
JavaScript |
Easy |
1780 |
The Candidate With the Most Votes |
|
Easy |
1781 |
Reverse ASCII Encoded Strings |
|
Easy |
1782 |
No Pairs Allowed |
|
Medium |
1783 |
Binary Tree Postorder Traversal-null |
JavaScript |
Easy |
1784 |
Decrease To Be Palindrome |
|
Easy |
1786 |
Pub Sub Pattern |
|
Easy |
1787 |
Google Suggestion (Map Reduce) |
|
Medium |
1788 |
Ascending Binary Sorting |
|
Medium |
1789 |
Distinguish Username |
|
Easy |
1790 |
Rotate String II |
TypeScript |
Easy |
1791 |
Simple queries |
|
Medium |
1792 |
Cut the sticks |
|
Easy |
1793 |
Balanced Array |
|
Easy |
1794 |
Count Duplicates |
|
Easy |
1795 |
Is Possible |
|
Medium |
1796 |
K-Difference |
|
Medium |
1797 |
optimalUtilization |
|
Easy |
1798 |
Minimum Cost to Merge Stones |
|
Hard |
1799 |
Sequence summation |
|
Easy |
1800 |
Float Combination Sum |
|
Medium |
1801 |
the sum of legal set |
|
Easy |
1802 |
Grid Game |
|
Medium |
1803 |
Rotate beam |
|
Hard |
1804 |
Find The Rank |
|
Easy |
1807 |
Fibonacci easy |
Python |
Easy |
1808 |
Minimum Domino Rotations For Equal Row |
|
Medium |
1811 |
Find Maximum Gold |
|
Medium |
1812 |
Rotation Number |
|
Easy |
1813 |
Construct Binary Tree |
|
Medium |
1814 |
Sum of all Subarrays |
Python |
Easy |
1815 |
Threhold Alerts |
|
Easy |
1816 |
Find the Smallest Divisor Given a Threshold |
TypeScript |
Medium |
1817 |
Divide Chocolate |
|
Hard |
1819 |
Longest Semi Alternating Substring |
|
Easy |
1820 |
Find Letter |
TypeScript |
Easy |
1821 |
Min Deletions To Obtain String in Right Format |
TypeScript |
Easy |
1822 |
Minimum Moves |
TypeScript |
Easy |
1823 |
Longest Prefix of Array |
|
Easy |
1824 |
Most Frequent Substring |
|
Medium |
1825 |
Number Change |
|
Medium |
1827 |
Number of Ways to Stay in the Same Place After Some Steps II |
TypeScript |
Medium |
1828 |
Lake Escape |
|
Hard |
1829 |
Find the number of shortest path |
|
Medium |
1831 |
Array Summarization |
|
Easy |
1832 |
Minimum Step |
|
Medium |
1833 |
pen box |
|
Medium |
1834 |
Grouping Options |
|
Hard |
1835 |
Number of Ways to Stay in the Same Place After Some Steps I |
TypeScript |
Easy |
1836 |
Reaching Point |
|
Medium |
1840 |
Matrix restoration |
|
Medium |
1844 |
subarray sum equals to k II |
|
Medium |
1846 |
Reaching Point II |
|
Medium |
1848 |
Word Search III |
|
Hard |
1849 |
Grumpy Bookstore Owner |
TypeScript |
Medium |
1850 |
Pick Apples |
TypeScript |
Medium |
1851 |
Buy Passes |
TypeScript |
Medium |
1852 |
Final Discounted Price |
TypeScript |
Medium |
1853 |
Efficient Job Processing Service |
|
Medium |
1854 |
Partition Array III |
|
Easy |
1855 |
Reach Destination |
|
Hard |
1856 |
Sub-palindrome |
|
Easy |
1857 |
Find Friend Circle Number |
|
Medium |
1858 |
Set of boxes |
|
Hard |
1859 |
Minimum Amplitude |
|
Easy |
1860 |
the Number of 0-submatrix |
|
Hard |
1861 |
Rat Jump |
|
Hard |
1862 |
Time to Flower Tree |
|
Medium |
1867 |
Most Frequent Word II |
|
Easy |
1868 |
Find the Number of “Balance” in the String |
|
Medium |
1869 |
Count Square Submatrices with All Ones |
|
Medium |
1870 |
Number of Substrings with All Zeroes |
TypeScript |
Medium |
1871 |
Maximum moment |
TypeScript |
Easy |
1872 |
Minimum Cost to Connect Sticks |
TypeScript |
Medium |
1874 |
Kth Smallest Element in a Specific Array |
|
Medium |
1876 |
Alien Dictionary(easy) |
TypeScript |
Easy |
1877 |
longest super sequence |
|
Medium |
1878 |
Rotated Nums |
TypeScript |
Easy |
1879 |
Two Sum VII |
|
Hard |
1880 |
Largest Number X Which Occurs X Times |
|
Easy |
1881 |
Aircraft seat |
TypeScript |
Easy |
1882 |
Fair Indexes |
TypeScript |
Medium |
1883 |
Top K Frequently Mentioned Keywords |
|
Medium |
1884 |
Take Away The Bottle |
|
Hard |
1885 |
A Strange Sorting Problem |
|
Hard |
1886 |
Moving Target |
TypeScript |
Easy |
1887 |
Stretch Word |
TypeScript |
Easy |
1888 |
Shortest Path in Matrix |
|
Medium |
1889 |
Interval Merge |
|
Medium |
1890 |
Form Minimum Number |
|
Medium |
1891 |
Travel Plan |
|
Medium |
1892 |
Mine-sweeping |
|
Medium |
1893 |
the Valid String |
|
Medium |
1894 |
Ad Click Analysis |
|
Easy |
1895 |
Arrange interview city |
TypeScript |
Easy |
1896 |
Pick Carrots |
TypeScript |
Easy |
1897 |
Meeting Room III |
|
Medium |
1899 |
Fetch supplies II |
|
Medium |
1900 |
Gene Similarity |
|
Hard |
1901 |
Squares of a Sorted Array |
TypeScript |
Easy |
1902 |
Find Google |
TypeScript |
Easy |
1903 |
Department Statistics |
|
Easy |
1904 |
Place the Balls |
|
Hard |
1905 |
Character deletion |
JavaScript |
Easy |
1906 |
Look for points that are bigger than the surrounding area |
TypeScript |
Easy |
1907 |
Array Game |
|
Medium |
1908 |
Boolean expression evaluation |
|
Hard |
1909 |
Order allocation |
|
Medium |
1910 |
Most numbers |
TypeScript |
Naive |
1911 |
As Far from Land as Possible |
TypeScript |
Medium |
1913 |
Query Student Enrollment Information |
|
Naive |
1914 |
Smart Sale |
JavaScript |
Medium |
1915 |
Lifting Weights |
|
Hard |
1916 |
Longest lighting time |
TypeScript |
Easy |
1917 |
Cutting Metal Surplus |
|
Medium |
1918 |
The height of the second tallest player |
|
Medium |
1919 |
Members Whose Scores Exceed the Group leader |
|
Naive |
1920 |
Find a Classmate with the Same Name |
|
Naive |
1921 |
Players Who Never Recharge |
|
Naive |
1922 |
Delete Duplicate Names |
|
Medium |
1923 |
Increasing Number of Infections |
|
Naive |
1924 |
Recommend Student to Study Science |
|
Naive |
1925 |
At Least Three Players Have Scored |
|
Naive |
1926 |
Popular Hero |
|
Naive |
1927 |
Coin Flip |
|
Naive |
1928 |
Analysis of Online Class I |
|
Naive |
1929 |
Analysis of Online Class II |
|
Medium |
1930 |
Public Rental Housing Information Query |
|
Naive |
1931 |
Find Specific Patient |
|
Naive |
1932 |
Students with the Most Failed Subjects I |
|
Naive |
1933 |
Students with the Most Failed Subjects II |
|
Medium |
1934 |
Zhang San's Story I |
|
Naive |
1935 |
Zhang San's Story II |
|
Medium |
1936 |
Zhang San's Story III |
|
Medium |
1937 |
Consecutive Empty Boxes |
|
Medium |
1938 |
Query User Email |
|
Naive |
1939 |
Resume Delivery I |
|
Medium |
1940 |
Resume Delivery II |
|
Medium |
1941 |
Find Right Triangle |
|
Naive |
1942 |
Two Nearest Saplings |
|
Medium |
1943 |
Looking for Students of a Certain Height |
|
Medium |
1944 |
Bike Sharing |
|
Naive |
1945 |
Club Annual Competition Score Ranking I |
|
Naive |
1946 |
Club Annual Competition Score Ranking II |
|
Medium |
1947 |
Install Django |
|
Naive |
1948 |
Show Hello, world! in the home page |
|
Naive |
1949 |
Count the Number of Users |
|
Naive |
1950 |
Query courses with more than 800 students |
|
Naive |
1951 |
Query courses with given teacher |
|
Naive |
1952 |
Query teachers over 20 years old |
|
Naive |
1953 |
Query the name of the Chinese teacher |
|
Naive |
1954 |
Query course information with the number of students within a specified range |
|
Naive |
1955 |
Query teachers who do not meet the conditions |
|
Naive |
1956 |
Query information about Eastern Heretic teachers |
|
Naive |
1957 |
Inquire about courses starting before May 2020 |
|
Naive |
1958 |
Query the courses that meet the conditions taught by the specified teacher |
|
Naive |
1959 |
Query information about Chinese and British teachers |
|
Naive |
1960 |
Query course information for a specific time |
|
Naive |
1961 |
Query information about non-Japanese and non-American teachers |
|
Naive |
1962 |
Query courses with teacher id other than 1 and 3 |
|
Naive |
1963 |
Search for teachers aged 20~25 whose nationality is not Chinese or British |
|
Naive |
1964 |
Query for course information about the number of students within the specified range |
|
Naive |
1965 |
Search for information on teachers who are not within the age range of 20 to 30 years |
|
Naive |
1966 |
Use NOT BETWEEN to search for teachers with Chinese nationality |
|
Naive |
1967 |
Search for courses starting with the letters 'D' to 'O' |
|
Naive |
1968 |
Query the course name with the first two letters between 'Db' and 'Dy' |
|
Naive |
1969 |
Query the courses starting in 2020 |
|
Naive |
1970 |
Search for courses with a creation date of June to August 2020 |
|
Naive |
1971 |
Search for teachers whose email is empty |
|
Naive |
1972 |
Inquire about Chinese and Japanese teachers who have e-mail addresses |
|
Naive |
1973 |
Search for all courses starting with the letter 'D' |
|
Naive |
1974 |
Query teacher information by email |
|
Naive |
1975 |
Inquire about the teacher who is Tencent's mailbox and is of Chinese nationality |
|
Naive |
1976 |
Sort course information by number of students |
|
Naive |
1977 |
Sorted by age of Chinese teachers in descending order |
|
Naive |
1978 |
Sort by age of Chinese teachers in ascending order |
|
Naive |
1979 |
Check the three courses with the lowest number of students |
|
Naive |
1980 |
Search for the oldest Chinese teacher |
|
Naive |
1981 |
Check the nationality of all teachers |
|
Naive |
1982 |
Check the age of teachers and sort them in ascending order |
|
Naive |
1983 |
Query the average number of students in the curriculum |
|
Naive |
1984 |
Count the number of different teacher_id |
|
Naive |
1985 |
Number of teachers aged 20 to 28 who are Chinese and British nationals |
|
Naive |
1986 |
Query the maximum number of students in all courses |
|
Naive |
1987 |
Find the age of the oldest Chinese teacher |
|
Naive |
1988 |
Check the number of students in the course with the lowest number of students |
|
Naive |
1989 |
Check the age of the youngest teacher |
|
Naive |
1990 |
The total number of students enroll in all courses |
|
Naive |
1991 |
Count the total number of students for teacher #3 |
|
Naive |
1992 |
Check average course enrollment |
|
Naive |
1993 |
Delete the course called Dynamic Programming |
|
Naive |
1994 |
Update all course information |
|
Naive |
1995 |
Check the average age of teachers over 20 years old |
|
Naive |
1996 |
Determining whether a teacher has a mailbox |
|
Naive |
1997 |
Check the information of teachers who do not have email and are older than 20 years old |
|
Naive |
1998 |
Statistics for courses in January to May 2020 |
|
Naive |
1999 |
Query the number of students and the course information that meets the requirements of the course name |
|
Naive |
2000 |
Search for course information of System Design |
|
Naive |
2001 |
Query the course information of 'Web' or 'Big Data' |
|
Naive |
2004 |
Delete all courses until 2020 |
|
Naive |
2005 |
Query information about 18-year-old Chinese teachers |
|
Naive |
2006 |
Query all courses |
|
Naive |
2007 |
Check course name and class size |
|
Naive |
2008 |
Query the course information of two courses |
|
Naive |
2009 |
Query all teachers |
|
Naive |
2010 |
Search all course names |
|
Naive |
2011 |
Search for information on courses with more than 1000 participants |
|
Naive |
2012 |
Find course information for the course named Artificial Intelligence |
|
Naive |
2013 |
Check the name of the teacher |
|
Naive |
2014 |
Query course name and course creation time |
|
Naive |
2015 |
Inserting Python course information into the course table |
|
Naive |
2016 |
Update the email address of the designated teacher |
|
Naive |
2017 |
Inserting SQL course information into the course table |
|
Naive |
2018 |
Insert 'Flash Sale' course information into the specified column of the course schedule |
|
Naive |
2019 |
Delete all rows in the table |
|
Naive |
2020 |
Update on the number of students choosing artificial intelligence |
|
Naive |
2021 |
Insert teacher information into the specified column of the teachers table |
|
Naive |
2022 |
Delayed all course creation dates by one year |
|
Naive |
2023 |
Calculate the number of days from 01/13/2018 to the time of course creation |
|
Naive |
2024 |
Query the course name and year of creation date of all course schedules |
|
Naive |
2025 |
Check the course creation time in the course schedule |
|
Naive |
2026 |
Insert the current time into the table (accurate to milliseconds) |
|
Naive |
2027 |
Query course creation date by 'year month' |
|
Naive |
2028 |
Postpone all course creation dates by one day |
|
Naive |
2029 |
Calculate the number of days from 03/26/2019 to the course creation time |
|
Naive |
2030 |
Query the hours of all course creation times |
|
Naive |
2031 |
Advance all course creation dates by one month |
|
Naive |
2032 |
Advance all course creation dates by one day |
|
Naive |
2033 |
Query the course name and creation time in seconds for all course schedules |
|
Naive |
2034 |
Check the average age of teachers at the end of the specified mailbox |
|
Naive |
2035 |
Calculate the number of years difference between the start date and the current date of all courses in the course schedule |
|
Naive |
2036 |
Calculate the number of months difference between the given date and the creation date of all courses in the course schedule |
|
Naive |
2037 |
Search for course titles and course dates through August 2020 |
|
Naive |
2038 |
Search for the date and time in the course creation time of the course schedule respectively |
|
Naive |
2039 |
Query the creation date of the course in the course schedule |
|
Naive |
2040 |
Search for courses with an instructor id of less than 3 and more than 800 students |
|
Naive |
2041 |
Search for information on courses taught by designated teachers |
|
Naive |
2042 |
Query all course names in the course schedule and the year and month of the creation date |
|
Naive |
2043 |
Search for courses created in the first quarter |
|
Naive |
2044 |
Output Hello SQL |
|
Naive |
2045 |
Output Hello LintCode |
|
Naive |
2046 |
The date the course was created is displayed in 'year-month-day hour:minute:second' |
|
Naive |
2047 |
Copy all the data in the teacher table to another table |
|
Medium |
2048 |
Search for information on all courses taught by a given teacher |
|
Medium |
2049 |
Change the course name created by the teacher Western Venom |
|
Medium |
2050 |
Search for teacher‘s name and the name of courses they taught |
|
Easy |
2051 |
Search for the names of teachers from China and the names of courses they taught |
|
Naive |
2052 |
Check the name of the instructor, email address and the name of courses they taught |
|
Naive |
2053 |
Check the name, email and course name of the teacher from China |
|
Naive |
2054 |
Check the course name and the age of the corresponding instructor |
|
Naive |
2055 |
Search for all course names and their corresponding instructor names and nationalities |
|
Naive |
2056 |
Copy the data in the teachers table that are older than 20 to another table |
|
Medium |
2057 |
Modify course information created by instructor Eastern Heretic |
|
Naive |
2058 |
Delete all courses for teachers younger than 21 years old |
|
Medium |
2059 |
Remove faculty who have created courses before 2020 |
|
Medium |
2060 |
Search for the name of the teacher for the 'Big Data' course |
|
Easy |
2061 |
Check the course title and email address of the instructor |
|
Naive |
2062 |
Query the id and name of all courses taught by the specified teacher |
|
Easy |
2063 |
Search for the names of all courses taught by teachers whose nationality is 'USA' |
|
Medium |
2064 |
Check course information for courses with more students than Western Venom teachers |
|
Medium |
2065 |
Check the course names of all courses taught by all teachers who are older than 20 years old |
|
Medium |
2066 |
Search for course information for courses with more students than the number of students in all courses of the oldest teacher |
|
Medium |
2067 |
Search for information on any course with more students than the 'Eastern Heretic' class size |
|
Medium |
2068 |
Check the maximum age of teachers of different nationalities |
|
Medium |
2069 |
Search for the course name and number of students in the course with the highest number of students per instructor |
|
Medium |
2070 |
Search for the name of a course created later than the creation time of any of the specified teacher's courses |
|
Medium |
2071 |
Search for information on the oldest faculty member whose nationality is American |
|
Medium |
2072 |
Search for course names of all courses taught by teachers who are not older than 20 years old |
|
Medium |
2073 |
Query the id and and the number of students for all courses taught by teachers whose nationality is not 'USA' and 'UK' |
|
Easy |
2074 |
Search for the names of teachers whose average number of students in classes taught by all teachers exceeds the average number of students in all courses |
|
Medium |
2075 |
Check the number of teachers in different countries |
|
Naive |
2076 |
Search for teacher information based on national average age |
|
Medium |
2077 |
Search for information on courses and instructors with the highest number of students |
|
Medium |
2078 |
Find out the number of teachers of different ages |
|
Naive |
2079 |
Count the total number of students in each teacher's course |
|
Medium |
2080 |
Search for the name of the instructor and the total number of students in all the instructor's courses with less than 3000 students |
|
Naive |
2081 |
Insert the current date into the table |
|
Naive |
2082 |
Statistics on the number of courses taught by each teacher |
|
Easy |
2083 |
Create student table and add primary key constraint on ID column |
|
Naive |
2084 |
Add primary key constraints to the course table courses |
|
Naive |
2085 |
Remove the primary key constraint from the course table courses |
|
Naive |
2086 |
Query the Nationality of Teachers Starting with ‘U’ and the Total Number of Students Between 2000 and 5000 and the Total Number of Students of Teachers of That Nationality |
|
Easy |
2087 |
Implemente Linear Regression based on sklearn |
|
Easy |
2088 |
First Java Code: Print Hello World |
Java |
Naive |
2089 |
Implement timer decorator |
|
Medium |
2090 |
Print Zero, Even and Odd Number II |
|
Medium |
2091 |
Adding Foreign Key Constraints to Course Tables |
|
Easy |
2092 |
Search for a lecturer number |
|
Easy |
2093 |
Check the portfolio of courses and teachers |
|
Naive |
2097 |
Find the sum of two parameters |
|
Naive |
2098 |
Read the values in the file and sum them |
|
Naive |
2105 |
Write Hello World! in the file |
|
Naive |
2106 |
Create a file directory and write Hello World! |
|
Naive |
2107 |
Copy files in bulk |
|
Medium |
2123 |
Get yesterday's date |
|
Naive |
2124 |
print hello |
|
Naive |
2125 |
Call the methods in the file main |
|
Naive |
2126 |
Import one of the files in a module folder |
|
Naive |
2127 |
Implementing reverse sorting of numbers in a list |
|
Naive |
2128 |
Use of list built-in methods |
|
Naive |
2129 |
Modify the value of a specified subscript of a list |
|
Naive |
2130 |
The subscript element of the specified list |
|
Naive |
2131 |
Nesting of lists |
|
Naive |
2132 |
Importing a module |
|
Naive |
2133 |
Use list derivatives to filter elements in any range |
|
Naive |
2134 |
General operation of the list |
|
Naive |
2135 |
Import a module and alias it |
|
Naive |
2136 |
Find out when a course was created and the nationality of the teacher |
|
Naive |
2137 |
Print out SMS verification code |
|
Naive |
2139 |
print format outputs course information |
|
Naive |
2140 |
The number of the two numbers in the list whose sum is equal to n |
|
Naive |
2141 |
Determine if a string is uppercase and the consecutive characters are not repeated |
|
Naive |
2142 |
Replace the elements in a string |
|
Naive |
2143 |
Implementing a shopping cart program |
|
Easy |
2145 |
Exception Handling |
|
Naive |
2146 |
Implement Decorator with Parameters |
|
Naive |
2147 |
Implement an API to Access User Data |
|
Easy |
2148 |
Implement User Login API |
|
Medium |
2153 |
Implement an API to Check User's Login Status |
|
Easy |
2155 |
Implement User Signup API |
|
Medium |
2156 |
Implement User Logout API |
|
Easy |
2157 |
Print Welcome to LintCode! |
Java |
Naive |
2158 |
Custom Exceptions |
|
Easy |
2159 |
Printing strings by splicing |
Java |
Naive |
2160 |
Print "Hello Java" |
Java |
Naive |
2161 |
Implement a Class Dog Inherit from Animal |
|
Medium |
2162 |
Filter Users by Email |
|
Easy |
2163 |
Realize age-based determination of adulthood |
Java |
Naive |
2164 |
Pass or fail according to the score |
Java |
Naive |
2165 |
Calculate the values of 1+2+3+... +n values |
Java |
Naive |
2166 |
Simple addition, subtraction, multiplication and division |
Java |
Naive |
2167 |
Get or Create a User Object |
|
Naive |
2168 |
Printable Trigonometric NIne NIne Multiplication Table |
Java |
Naive |
2169 |
Three by three generation of data |
|
Medium |
2170 |
Read file contents |
|
Naive |
2171 |
Django Rest Framework Setup (Bug Fix) |
|
Naive |
2172 |
Implement User Login API (Bug Fix I) |
|
Easy |
2173 |
Implement User Signup API (Bug Fix) |
|
Naive |
2174 |
Query the number of 'your' words in the file |
|
Naive |
2175 |
Rounding |
Java |
Naive |
2176 |
Find the maximum value of an array |
Java |
Naive |
2177 |
Implement User Login API (Bug Fix II) |
|
Easy |
2178 |
Iterators and Fibonacci series |
|
Easy |
2180 |
Comparing the size of two numbers |
|
Naive |
2181 |
Iterator and an even series |
|
Easy |
2182 |
Calculate the sum of all positive integers up to and including n that are divisible by 3 |
Java |
Naive |
2183 |
Determine the student's achievement range based on the student's achievement level |
Java |
Naive |
2184 |
Implement User Signup API (Bug Fix II) |
|
Easy |
2185 |
Count the number of times an element appears in the list |
|
Naive |
2186 |
Calculate the factorial of n |
|
Naive |
2187 |
Combining and sorting lists (one) |
|
Naive |
2188 |
Get the element with index 1 |
Java |
Naive |
2189 |
Check the age of teachers and sort in ascending order |
|
Naive |
2190 |
Select nationality from teacher between 20 and 25 who is not from China or UK |
|
Easy |
2191 |
Query information about teachers over n years old |
|
Naive |
2192 |
Query teacher information by email (Django) |
|
Naive |
2193 |
Query the information of the teacher whose id is 1 |
|
Easy |
2194 |
Query the first few data |
|
Naive |
2195 |
Query teacher information whose specified field is empty |
|
Naive |
2196 |
Query teacher information of a given nationality |
|
Naive |
2197 |
Query information about teachers who are not older than the specified age and are not of the specified nationality |
|
Easy |
2198 |
Query all the information of the teacher |
|
Naive |
2199 |
Remove empty lines from files |
|
Naive |
2200 |
Calculate all leap years from 1949 to n |
Java |
Naive |
2201 |
Get the element whose index is the last digit |
Java |
Naive |
2202 |
Calculate Sum (Python version) |
|
Naive |
2203 |
Get the length of the string |
Java |
Naive |
2204 |
The remainder of a partial function to divide two positive integers |
|
Easy |
2205 |
Binary to decimal conversion |
|
Naive |
2206 |
Get the sum of the lengths of all strings in the string array |
Java |
Naive |
2207 |
Filter out all odd numbers |
|
Medium |
2208 |
Create objects, assign values to object properties and print |
Java |
Naive |
2209 |
Create subclass objects and print data using parent class methods |
Java |
Easy |
2211 |
Judge the number of palindrome |
|
Naive |
2212 |
Write assignment methods and print methods for object properties |
Java |
Naive |
2216 |
String summing, repeated output, slicing |
|
Naive |
2226 |
Determine if the specified character is present in the string |
|
Naive |
2227 |
Bit arithmetic shift left by three bits (Java version) |
Java |
Naive |
2228 |
Slicing and Splicing |
|
Naive |
2229 |
Find the length, maximum value and minimum value of a tuple |
|
Naive |
2231 |
Implementing the area calculation method |
Java |
Naive |
2232 |
Print the food that cats and dogs like to eat |
Java |
Easy |
2240 |
Update string |
|
Naive |
2241 |
Get the millisecond value of the specified date |
Java |
Easy |
2242 |
Print book information |
Java |
Easy |
2244 |
Print work content |
Java |
Naive |
2246 |
Polymorphic way to call drawing methods |
Java |
Naive |
2247 |
decision odd or even |
|
Naive |
2248 |
Calculate the number of days of a person's birth |
Java |
Easy |
2249 |
Implement the methods of the Pig and Dog classes |
Java |
Easy |
2250 |
The absolute value of an integer |
|
Naive |
2251 |
Print the name and number information of three objects |
Java |
Naive |
2252 |
Judgment Results |
|
Naive |
2253 |
Print the characteristics of spring, summer, autumn and winter |
Java |
Naive |
2254 |
Get the length of the string after removing spaces |
Java |
Naive |
2256 |
Replace the contents of a string |
Java |
Easy |
2257 |
Determining whether a number is prime or not |
|
Naive |
2258 |
Find the largest prime number backwards |
|
Naive |
2259 |
Calculate Sum (Java version) |
Java |
Naive |
2260 |
List slicing with step |
|
Naive |
2261 |
Delete elements in the list |
|
Naive |
2262 |
Splicing and copying of lists |
|
Naive |
2263 |
string splicing |
|
Naive |
2264 |
Convert upper and lower case letters in a string |
|
Naive |
2265 |
Find the maximum and minimum values of the elements in a tuple |
|
Naive |
2266 |
Swap Two Integers (Java version) |
Java |
Naive |
2267 |
Find The Maximum Of Three Numbers (Python version) |
|
Naive |
2268 |
Get the attributes of a bull |
Java |
Naive |
2269 |
Swap Two Integers (Python version) |
|
Naive |
2270 |
Integer Arithmetic (Java version) |
Java |
Naive |
2271 |
Integer Arithmetic (Python version) |
|
Naive |
2272 |
Find The Maximum Of Three Numbers (Java version) |
Java |
Naive |
2273 |
Sequential Output (Python version) |
|
Naive |
2274 |
First Python Code: Print Hello World |
|
Naive |
2275 |
Sequential Output (Java version) |
Java |
Naive |
2276 |
Modify and delete elements in the dictionary |
|
Naive |
2277 |
Calculate the sum of all values in the dictionary |
|
Naive |
2278 |
Access to student information |
Java |
Naive |
2279 |
Reverse Integer Order (Python version) |
|
Naive |
2281 |
Merge dictionary |
|
Naive |
2282 |
Circular Perimeter (Python version) |
|
Naive |
2283 |
Circular Perimeter (Java version) |
Java |
Naive |
2284 |
Judge The Multiple Of 3 And 5 (Python version) |
|
Naive |
2286 |
Find the greatest common divisor (Python version) |
|
Naive |
2287 |
Judge The Multiple Of 3 And 5 (Java version) |
Java |
Naive |
2288 |
ASCII Code Of The Character (Python version) |
|
Naive |
2289 |
ASCII Code Of The Character (Java version) |
Java |
Naive |
2290 |
Find the greatest common divisor (Java version) |
Java |
Naive |
2291 |
Splicing and copying of tuple |
|
Naive |
2311 |
Rounding a string number |
Java |
Naive |
2312 |
Combine the keys and values of the dictionary into a new list |
|
Easy |
2313 |
Print the character represented by the Plum, Orchid and Bamboo |
Java |
Naive |
2314 |
List modification, addition and deletion of elements |
Python |
Naive |
2315 |
Judge the triangle (Python version) |
|
Naive |
2316 |
Judgment Triangle (Java Edition) |
Java |
Naive |
2317 |
Take A Square Root (Python version) |
|
Naive |
2318 |
Using Anonymous Internal Classes |
Java |
Naive |
2319 |
List nesting |
|
Naive |
2320 |
Take A Square Root (Java version) |
Java |
Naive |
2321 |
Hit rate rating (Python version) |
|
Naive |
2322 |
Delete the content at the specified position in the string |
Java |
Easy |
2323 |
Hit rate rating (Java version) |
Java |
Naive |
2324 |
Output String In Reverse Order (Python version) |
|
Naive |
2325 |
Output string in reverse order (Java version) |
Java |
Naive |
2326 |
Determining whether an integer is a daffodil number |
Java |
Naive |
2327 |
Finding The Distance Between Two Points In Rectangular Coordinate System (Python version) |
|
Naive |
2328 |
Operations between sets |
|
Naive |
2329 |
Finding The Distance Between Two Points In Rectangular Coordinate System (Java version) |
Java |
Naive |
2330 |
Calculate the time after x seconds |
|
Naive |
2331 |
Find the length, maximum value and minimum value of list |
|
Naive |
2332 |
Calculate Factorial (Python Edition) |
|
Naive |
2333 |
Print matrix (Python version) |
|
Naive |
2334 |
Calculate factorial (Java Edition) |
Java |
Naive |
2335 |
Find all the daffodils (Python version) |
|
Naive |
2336 |
Case conversion of letters in strings |
Java |
Easy |
2337 |
Set containment |
|
Naive |
2338 |
Using custom exceptions |
Java |
Naive |
2339 |
Judging Leap Year (Java version) |
Java |
Naive |
2340 |
Count the number of lowercase letters (Python version) |
|
Naive |
2341 |
Find the number of lowercase letters (Java version) |
Java |
Naive |
2342 |
The sum of the main diagonal elements (Python version) |
|
Naive |
2343 |
Judge Whether It Is A Complete Number (Python version) |
|
Naive |
2344 |
Determine whether it is a perfect number (Java version) |
Java |
Naive |
2345 |
Movement distance calculation (Python version) |
|
Naive |
2346 |
Movement distance calculation (Java version) |
Java |
Naive |
2347 |
Use of Static Code Blocks |
Java |
Naive |
2348 |
Output Yanghui Triangle (Python version) |
|
Naive |
2349 |
Count the number of different characters in a string |
Java |
Easy |
2350 |
Judging Leap Year (Python version) |
|
Naive |
2351 |
Splicing Two Strings (Python version) |
|
Naive |
2352 |
Splicing Two Strings (Java version) |
Java |
Naive |
2353 |
Generate a dictionary of perfect squares |
|
Naive |
2354 |
Odd sum and even sum (Java Edition) |
Java |
Naive |
2355 |
Odd Sum And Even Sum (Python Edition) |
|
Naive |
2356 |
Print nine-nine multiplication table (Python version) |
|
Naive |
2357 |
Exchange within an array (Python version) |
|
Naive |
2358 |
Exporting prime numbers |
Java |
Naive |
2359 |
Print nine-nine multiplication table (Java version) |
Java |
Naive |
2360 |
Find all the daffodils (Java version) |
Java |
Naive |
2361 |
The sum of the main diagonal elements (Java version) |
Java |
Naive |
2362 |
Count the number of elements consisting of pure numbers and pure letters from the specified list separately |
|
Naive |
2363 |
Split the string according to the line boundary character and find the longest line |
|
Easy |
2364 |
Output the nth prime number |
|
Naive |
2365 |
Calculate the sum of the array (Python version) |
|
Naive |
2366 |
Calculate the sum of the array (Java version) |
Java |
Naive |
2367 |
Array sort (Python version) |
|
Naive |
2368 |
Array sort (Java version) |
Java |
Naive |
2369 |
Using the final keyword |
Java |
Naive |
2370 |
Dictionary key value swap |
|
Naive |
2371 |
Converts a specified temperature from Fahrenheit to Celsius |
|
Naive |
2372 |
break Out Of Loop (Python version) |
|
Naive |
2373 |
break out of the loop (Java version) |
Java |
Naive |
2374 |
Bug fix for final keyword |
Java |
Naive |
2375 |
Judge the power of two(Java Edition) |
Java |
Naive |
2376 |
Determine the number of echoes |
Java |
Naive |
2377 |
Determine The Power Of 2 (Python version) |
|
Naive |
2378 |
final variables are immutable |
Java |
Naive |
2379 |
Connect list elements (Python version) |
|
Naive |
2380 |
Create an ArrayList collection and add data |
Java |
Naive |
2381 |
Exchange in an array (Java version) |
Java |
Naive |
2382 |
Can drink at most a few bottles of wine (Python version) |
|
Naive |
2383 |
Headerised strings |
|
Naive |
2384 |
Bug fix for static keyword |
Java |
Naive |
2385 |
Find a To The Power Of b (Python version) |
|
Naive |
2386 |
Find a To The Power Of b (Java version) |
Java |
Naive |
2387 |
Find the most expensive item |
|
Naive |
2389 |
Removing duplicate numbers |
Java |
Naive |
2390 |
Complete the string determination as required |
|
Naive |
2391 |
Create a HashSet collection and add data |
Java |
Naive |
2392 |
Iterate over the key-value pairs in the print dictionary |
|
Naive |
2393 |
Iterating through an ArrayList collection |
Java |
Naive |
2394 |
Print matrix (Java version) |
Java |
Naive |
2395 |
Count the number of occurrences of a string |
|
Naive |
2396 |
Generator matrix |
|
Naive |
2397 |
List comprehension |
|
Naive |
2398 |
Output integers in reverse order (Java version) |
Java |
Naive |
2399 |
List merge and sort (two) |
|
Naive |
2400 |
Create a HashMap set and add data |
Java |
Naive |
2401 |
Letter transformation (Python version) |
|
Naive |
2402 |
Letter Transformation (Java Edition) |
Java |
Naive |
2403 |
Outputs the Key and Value of all data in the HashMap collection |
Java |
Naive |
2404 |
Removing duplicate elements and sorting |
Java |
Naive |
2405 |
String replacement |
|
Naive |
2406 |
String de-duplication and order assurance |
Java |
Naive |
2407 |
Calculate the value of a + aa + aaa + aaaa |
|
Naive |
2408 |
String character sorting |
Java |
Naive |
2409 |
Create a dictionary with the specified sequence and values |
|
Naive |
2410 |
Delete the last key-value pair of the dictionary |
|
Naive |
2411 |
Print the number of days contained in each month |
Java |
Naive |
2412 |
continue To Continue The Loop (Python version) |
|
Naive |
2413 |
continue To Continue The Loop (Java version) |
Java |
Naive |
2414 |
Print prime numbers (Python version) |
|
Naive |
2415 |
Looking for missing numbers (Java version) |
Java |
Naive |
2416 |
N threads to achieve quick sort |
|
Hard |
2417 |
Count how many numbers are in the string |
Java |
Naive |
2418 |
Bit arithmetic shift left by three bits (Python version) |
|
Naive |
2419 |
Output the elements of the set in reverse order |
Java |
Naive |
2420 |
Looking for missing numbers (Python version) |
|
Naive |
2422 |
Find the position index of a substring in a string |
Java |
Naive |
2423 |
Calls to private variables |
Java |
Naive |
2424 |
Output Yanghui Triangle (Java version) |
Java |
Naive |
2425 |
Calculate the number of folds of paper |
Java |
Naive |
2426 |
Print prime numbers (Java version) |
|
Naive |
2427 |
Implement the Tweet Model |
|
Easy |
2428 |
Start 2 threads to print interleavly 1-n |
|
Medium |
2429 |
Calculate how long since the tweet was posted |
|
Easy |
2430 |
Implement the Friendship Model |
|
Easy |
2433 |
3 threads interleavly print decreasing numbers n - 1 |
|
Medium |
2434 |
Define composite index and default ordering |
|
Easy |
2435 |
Get User Posted Tweets |
|
Easy |
2436 |
Two threads interleavly print numbers and letters |
|
Medium |
2437 |
Implement API to create new tweet |
|
Easy |
2438 |
n threads print 1-m |
|
Medium |
2439 |
Start 2 threads to print "Hello" and "World" respectively |
|
Medium |
2442 |
Print ABC interleavly |
|
Medium |
2443 |
Get All following Users |
|
Easy |
2444 |
3 threads to print n groups |
|
Medium |
2445 |
Implement Follow User API |
|
Medium |
2446 |
Get All followers |
|
Easy |
2447 |
Implement an API to Unfollow a User |
|
Medium |
2448 |
N threads to achieve merge sort |
|
Hard |
2449 |
Sleep Sort |
|
Easy |
2450 |
Start the thread to print hello world |
|
Naive |
2451 |
Use 10 threads to calculate the sum of 1-n |
|
Medium |
2452 |
Main thread and sub thread print interleavly |
|
Medium |
2453 |
Use N threads to calculate the sum of the array |
|
Medium |
2454 |
N threads to find the number with most factors |
|
Easy |
2455 |
Define Comment Model |
|
Medium |
2456 |
Implement an API to Created Comment |
|
Medium |
2457 |
Implement an API to Update Comments |
|
Medium |
2458 |
Implement an API to Delete Comment |
|
Medium |
2459 |
Nth highest player height |
|
Medium |
2460 |
Player Height Ranking1 |
|
Medium |
2462 |
Design Bounded Blocking Queue |
|
Medium |
2463 |
Define the NewsFeed Model |
|
Medium |
2464 |
Implement an API to Get NewsFeeds |
|
Easy |
2465 |
Data shuffle based on Sklearn |
|
Naive |
2466 |
List deduplicate |
|
Naive |
2467 |
Design Bounded Blocking Stack |
|
Medium |
2468 |
Fanout New Tweets to NewsFeed |
|
Medium |
2469 |
Implement an API to Get Comment List |
|
Medium |
2470 |
Implement a single tweet API with comments |
|
Medium |
2471 |
Design Thread Safe Linked List |
|
Medium |
2472 |
Adding elements to a set |
|
Naive |
2473 |
Design Thread Safe Hash Table |
|
Medium |
2474 |
Define The Like Model |
|
Medium |
2475 |
Implement an API to Create Like |
|
Hard |
2476 |
Implement an API to Dislike |
|
Medium |
2477 |
Inject like information into the comment API |
|
Medium |
2478 |
Implement an API to Send Comment Notification |
|
Medium |
2479 |
Implement an API to Send Like Notification |
|
Medium |
2491 |
Implement an API to get the number of unread messages |
|
Easy |
2492 |
Implement data normalization based on Sklearn |
|
Naive |
2493 |
Implement data standardization based on Sklearn |
|
Naive |
2494 |
Summation of a tuple at a specified position |
|
Naive |
2495 |
Calculate F1 score of data based on Sklearn |
|
Naive |
2496 |
4 threads modify the same variable |
|
Easy |
2497 |
Deposit and Withdraw Money |
|
Easy |
2498 |
Set update operation |
|
Naive |
2499 |
Height of players appearing consecutively |
|
Medium |
2500 |
Highest scoring player in the team |
|
Medium |
2501 |
Implement the One Click Read API |
|
Easy |
2502 |
Design Thread Safe Array List |
|
Medium |
2503 |
Implement a thread-safe counter |
|
Easy |
2504 |
Log recording with multithreading |
|
Easy |
2505 |
Calculate accuracy score based on Sklearn |
|
Naive |
2506 |
Remove the Invalid Parentheses |
JavaScript |
Easy |
2507 |
Recognition hand writing digital images based on KNN algorithm |
|
Easy |
2508 |
Recognition hand writing digital images based on Logistic Regression algorithm |
|
Easy |
2509 |
Find a number that appears only once in the list |
|
Easy |
2510 |
Recognition hand writing digital images based on Multi-layer Perceptron |
|
Easy |
2511 |
Code constructor to initialize student class instance |
|
Easy |
2513 |
Remove Folder |
|
Naive |
2514 |
Copy folder |
|
Naive |
2515 |
The only number that exists |
Java |
Naive |
2518 |
Series Data Type Creation |
|
Naive |
2519 |
DataFrame Data Type Creation |
|
Naive |
2520 |
pandas index |
|
Naive |
2521 |
pandas Hierarchical Index |
|
Naive |
2522 |
pandas data merge |
|
Naive |
2523 |
Hand writing digital image recognition based on MNIST dataset |
|
Medium |
2524 |
Group Aggregation |
|
Easy |
2525 |
basic_attribute_and_overall_situation_query |
|
Naive |
2526 |
Pandas Data Read |
|
Naive |
2527 |
Pandas Missing value handling |
|
Naive |
2528 |
data_analysis_for_mean_value |
|
Naive |
2529 |
Removing duplicate values from dataset using Pandas |
|
Naive |
2530 |
Intercept even numbers from a given sequence |
|
Naive |
2531 |
Index of matrix elements |
|
Easy |
2532 |
numpy mathematical calculation method practice |
|
Easy |
2533 |
Create an 8x8 chess board matrix |
|
Easy |
2534 |
Create a dtype to represent the color (RGBA) |
|
Easy |
2535 |
Calculate the matrix by subtracting the average of each row |
|
Naive |
2536 |
Create a numpy array |
|
Naive |
2538 |
Based on SimpleImputer class to do missing value processing |
|
Naive |
2539 |
Fill missing values using KNN |
|
Easy |
2540 |
Your First Git Commit |
|
Easy |
2541 |
one-hot code |
|
Naive |
2542 |
Update Linghu Chong's email |
|
Naive |
2543 |
Implement dimensionality reduction based on sklearn |
|
Naive |
2544 |
Insert information about Feng Qingyang |
|
Naive |
2545 |
Implement K-means clusting algorithm based on sklearn |
|
Naive |
2546 |
Find outliers in the data using the absolute median difference algorithm (MAD) |
|
Medium |
2547 |
Query all information in the teachers table |
|
Naive |
2548 |
Update Southern Emperor's email |
|
Naive |
2549 |
Create a new folder |
|
Naive |
2550 |
Find outliers in the data using density-based local outlier factor algorithm (LOF) |
|
Medium |
2551 |
Normalizing data using z-score |
|
Easy |
2552 |
Normalize the data using min-max standardization |
|
Easy |
2553 |
Delete Linghu Chong's message |
|
Naive |
2554 |
Insert information about Chong Xu |
|
Naive |
2555 |
Create a new file |
|
Naive |
2556 |
Update the age of Linghu Chong |
|
Naive |
2557 |
Insert information about Xie Xun |
|
Naive |
2558 |
H2O generation |
|
Medium |
2559 |
Withdrawal of age update for Linghu Chong |
|
Naive |
2560 |
Undo the insertion of Xie Xun's message |
|
Naive |
2564 |
Create a Trigger "before_teachers_insert" |
|
Easy |
2565 |
Create a Trigger "before_teachers_update" |
|
Easy |
2566 |
Logistic regression doing dichotomous classification for cancer prediction |
|
Naive |
2567 |
Delete the Trigger "before_teachers_insert" |
|
Easy |
2568 |
Delete the Trigger "before_teachers_update" |
|
Easy |
2569 |
Normative courses table data insert |
|
Medium |
2570 |
New data processing of recruitment information statistics table |
|
Medium |
2571 |
Text classification based on plain Bayesian algorithm |
|
Naive |
2572 |
New data trigger message alert |
|
Medium |
2573 |
Backup New Data Trigger |
|
Medium |
2574 |
Copying documents |
|
Naive |
2575 |
Normative courses table data update |
|
Medium |
2576 |
Update data processing of recruitment information statistics table |
|
Medium |
2577 |
Backup Update Data Trigger |
|
Medium |
2578 |
Update data trigger message alert |
|
Hard |
2579 |
Calling the sklearn API to implement linear regression to predict home prices in California |
|
Easy |
2580 |
yh_Split dataset (do not move) |
|
Naive |
2581 |
Automatic backup when deleting teacher information |
|
Medium |
2582 |
Moving documents |
|
Naive |
2583 |
Delete data trigger message alert |
|
Medium |
2584 |
shows model loss in predicting boston house prices with cross-validation for ridge regression |
|
Easy |
2585 |
Moving folders |
|
Naive |
2586 |
Delete document |
|
Naive |
2587 |
Associated processing when deleting teachers table information (I) |
|
Easy |
2588 |
Calculate the mean square error loss of the linear regression model |
|
Easy |
2589 |
Calculate precision score of data based on Sklearn |
|
Naive |
2590 |
Calculate recall score of data based on Sklearn |
|
Naive |
2591 |
Manual implementation of linear regression completes California home price forecasting model |
|
Medium |
2592 |
Associated processing when deleting teachers table information (II) |
|
Medium |
2593 |
Show current directory |
|
Naive |
2594 |
Access to the specified directory |
|
Naive |
2595 |
Implement SGD based on sklearn |
|
Naive |
2596 |
compute binary cross-entropy with log_loss |
|
Naive |
2597 |
List file directories and file names |
|
Naive |
2598 |
Show all triggers for teachers table |
|
Easy |
2599 |
Compare the differences between the two documents |
|
Naive |
2600 |
Manual implementation of Principal Component Analysis (PCA) to complete data dimensionality reduction |
|
Medium |
2601 |
Calculate R2 score for model based on sklearn |
|
Naive |
2602 |
Handwritten KNN algorithm for digital image recognition |
|
Medium |
2603 |
Checking disk usage |
|
Naive |
2604 |
View the space occupied by a file |
|
Naive |
2605 |
View username and group name |
|
Naive |
2606 |
View user ID and group ID |
|
Naive |
2607 |
Handwritten K-means algorithm for clustering of iris dataset |
|
Hard |
2608 |
Compare the two documents |
|
Naive |
2609 |
Manual implementation of Logistic Regression to complete the Binary Classification Problem |
|
Medium |
2610 |
Implement SVM classifier based on sklearn |
|
Easy |
2611 |
Determine if two arrays are equal |
Java |
Naive |
2612 |
Build a decision tree for prediction based on sklearn API |
|
Easy |
2613 |
Submit a document amendment |
|
Naive |
2614 |
Find the perimeter and area of a rectangle |
Java |
Easy |
2615 |
Print the student's personal information |
Java |
Easy |
2616 |
Insert Kansas information into the teacher table |
|
Easy |
2617 |
View the current transaction isolation level of the database |
|
Easy |
2618 |
Convert characters in a string to ASCII code |
Java |
Easy |
2619 |
Track and submit document changes |
|
Naive |
2620 |
View the self-incrementing locking pattern for MySQL databases |
|
Easy |
2621 |
Implementing an API to Update Notification Status |
|
Medium |
2622 |
Print information about cows and horses |
Java |
Easy |
2623 |
Find eligible files in a directory (i) |
|
Easy |
2624 |
Birds eat worms |
Java |
Naive |
2625 |
Whether two strings are equal |
Java |
Naive |
2626 |
Add files to the stage |
|
Naive |
2627 |
Troubleshoot the current database table locks and view the table lock analysis |
|
Easy |
2628 |
Find eligible files in a directory (ii) |
|
Easy |
2629 |
Manual implementation of decision tree algorithm - complete calculation of Gini index function |
|
Medium |
2630 |
Find eligible files in a directory (iii) |
|
Medium |
2631 |
Array string conversion |
Java |
Easy |
2632 |
Intercept the string at the specified position |
|
Naive |
2633 |
Troubleshoot the current database row locks and view row lock analysis |
|
Easy |
2634 |
Defining the UserProfile model |
|
Easy |
2635 |
The use of optimistic locks and pessimistic locks (I) |
|
Medium |
2642 |
Get user configuration |
|
Medium |
2643 |
Create file link (I) |
|
Naive |
2644 |
Drinking milk for breakfast |
Java |
Naive |
2645 |
Viewing the contents of a file using a different binary |
|
Naive |
2646 |
Implement decision tree algorithm - complete information entropy calculation function |
|
Medium |
2647 |
Implement the function of uploading user avatar |
|
Medium |
2648 |
View file contents using different decoding methods |
|
Naive |
2649 |
Define the tweet picture model |
|
Medium |
2650 |
Implement the Tweet API |
|
Medium |
2651 |
Implement the function of determining whether you have followed or not |
|
Medium |
2652 |
Implement friend relationship paging function |
|
Medium |
2653 |
Display String (i) |
|
Naive |
2654 |
Put a line lock on the data 'id = 3' |
|
Easy |
2655 |
Array replacement |
Java |
Naive |
2656 |
Create file link (II) |
|
Naive |
2657 |
Zhang San's self-introduction |
Java |
Naive |
2658 |
Display personalized information of users |
|
Medium |
2659 |
Implement the function of modifying user nickname |
|
Medium |
2660 |
git Branch Renaming |
|
Naive |
2661 |
What day of the week is this |
Java |
Easy |
2662 |
Merge files |
|
Naive |
2663 |
Check Pet Information |
Java |
Naive |
2664 |
Recognizing SQL Views (I) |
|
Naive |
2665 |
Recognizing SQL Views (II) |
|
Easy |
2666 |
Ridge regression based on sklearn to predict boston house prices |
|
Easy |
2667 |
Plotting lines based on Matplotlib |
|
Naive |
2668 |
Create and switch branches |
|
Naive |
2669 |
Modify the last commit |
|
Easy |
2670 |
I am Kang Kang |
Java |
Naive |
2671 |
Backtrack and recommit commit |
|
Easy |
2672 |
Image reading and saving based on Matplotlib |
|
Easy |
2673 |
Subplotting based on Matplotlib |
|
Easy |
2674 |
Creating a simple SQL View (I) |
|
Medium |
2675 |
Date format conversion |
Java |
Naive |
2676 |
Creating a simple SQL View (II) |
|
Medium |
2677 |
Advanced plot() function - Customizing the output style |
|
Easy |
2678 |
Split a large file into multiple small files |
|
Naive |
2679 |
Display String (ii) |
|
Naive |
2680 |
Predictive classification of iris dataset based on sklearn's stacking algorithm |
|
Easy |
2681 |
Display String (iii) |
|
Naive |
2682 |
The Nth day of the year |
Java |
Naive |
2683 |
Zhang San's MySQL Learning Path (I) |
|
Hard |
2684 |
Making a cup of coffee |
Java |
Easy |
2685 |
Zhang San's MySQL Learning Path (II) |
|
Hard |
2686 |
Bar plotting based on Matplotlib |
|
Easy |
2687 |
Scatter plotting based on Matplotlib |
|
Easy |
2689 |
Redefining the teachers view |
|
Easy |
2690 |
Exception Capture I |
Java |
Naive |
2691 |
View file details |
|
Naive |
2692 |
Count the total number of students taught by each faculty member |
|
Easy |
2693 |
File creation preset permissions |
|
Naive |
2694 |
Print the upper and lower case alphabet |
Java |
Naive |
2695 |
Retrieves the specified items of a document by different delimiters |
|
Naive |
2696 |
Cache and restore across branches |
|
Naive |
2697 |
Find a compliant document (i) |
|
Naive |
2698 |
Find a compliant document (ii) |
|
Naive |
2699 |
Exception Capture II |
Java |
Naive |
2700 |
Update Linghu Chong's age by view |
|
Easy |
2701 |
Remove documents |
|
Easy |
2702 |
Delete Linghu Chong's teacher data by view |
|
Easy |
2703 |
Decision making using adaboost algorithm based on sklearn API |
|
Naive |
2704 |
Zhang San's MySQL Learning Path (III) |
|
Hard |
2705 |
Show view in the current database |
|
Easy |
2706 |
Renaming views (I) |
|
Easy |
2707 |
Renaming views (II) |
|
Easy |
2708 |
Drop View (I) |
|
Easy |
2709 |
Drop View (II) |
|
Easy |
2710 |
Copy Files (i) |
|
Naive |
2711 |
Move documents |
|
Naive |
2712 |
View the type of command |
|
Naive |
2713 |
Find the location of the command |
|
Naive |
2714 |
Implementation of gradient boosting decision tree (GBDT) for breast cancer disease prediction |
|
Medium |
2715 |
View Processing Algorithm Merge |
|
Easy |
2716 |
View Processing Algorithm TEMPTABLE |
|
Easy |
2717 |
Serialized attention status |
|
Easy |
2718 |
Define friend relationship pager |
|
Easy |
2719 |
Execute expression |
|
Naive |
2720 |
Creating a view that ensures consistency (I) |
|
Easy |
2721 |
Creating a view that ensures consistency (II) |
|
Easy |
2722 |
Implement Random Forest based on sklearn |
|
Easy |
2723 |
Showing the definition of a view |
|
Easy |
2724 |
Cascade checking of views |
|
Easy |
2725 |
Local checking of views |
|
Easy |
2726 |
File View |
|
Naive |
2727 |
Compare document differences by column (ii) |
|
Naive |
2728 |
Implement tweet paging function |
|
Medium |
2729 |
Writing to a file |
|
Easy |
2730 |
Delete file contents |
|
Easy |
2731 |
Inject like information and comment information into the Tweet API |
|
Medium |
2732 |
View submission history |
|
Naive |
2733 |
Replacement and presentation of document content in rows |
|
Easy |
2735 |
Realize the paging function of new things |
|
Medium |
2736 |
Document content sorting(i) |
|
Naive |
2737 |
Document content sorting(ii) |
|
Naive |
2738 |
Document content sorting(iii) |
|
Naive |
2739 |
Remove duplicate lines in the file |
|
Naive |
2740 |
Expression evaluation (I) |
|
Naive |
2741 |
Tagging |
|
Easy |
2742 |
Expression evaluation (II) |
|
Naive |
2743 |
Expression evaluation (III) |
|
Naive |
2744 |
Cache people who are following |
|
Medium |
2745 |
Use the cache to determine whether the function has been followed |
|
Medium |
2746 |
Formatted view of historical submission records |
|
Naive |
2747 |
Caching user information |
|
Medium |
2748 |
Implement user cache invalidation function |
|
Medium |
2750 |
Define a general cache helper |
|
Medium |
2751 |
Convert a file from lowercase to uppercase |
|
Naive |
2752 |
Word counts |
|
Naive |
2753 |
Word counts(ii) |
|
Naive |
2754 |
Set command aliases |
|
Naive |
2755 |
View System Information |
|
Naive |
2756 |
View itinerary |
|
Naive |
2757 |
Setting up the shell |
|
Naive |
2758 |
Input and output redirection |
|
Naive |
2759 |
The range of Integer values |
Java |
Easy |
2760 |
Understanding SQL Procedures (I) |
|
Easy |
2761 |
Understanding SQL Procedures (II) |
|
Easy |
2793 |
Execute the command in the variable |
|
Naive |
2794 |
Execute the command in the variable(ii) |
|
Naive |
2795 |
Set Environment Variables |
|
Naive |
2796 |
Shell Resource Settings |
|
Naive |
2797 |
Setting and deleting variables |
|
Naive |
2798 |
Aop Simplify Log |
|
Easy |
2799 |
Creating a procedure for inserting data in bulk |
|
Medium |
2800 |
Zhang San's MySQL Learning Path (IV) |
|
Hard |
2801 |
Delete Stored Procedure (I) |
|
Easy |
2802 |
Delete Stored Procedure (II) |
|
Easy |
2803 |
Compressed files |
|
Naive |
2804 |
Unzip the file |
|
Naive |
2805 |
Cache user personalized configuration information |
|
Easy |
2806 |
MySQL Stored Procedure IN Parameters I |
|
Easy |
2807 |
MySQL Stored Procedure IN Parameters II |
|
Easy |
2808 |
MySQL Stored Procedure OUT Parameters I |
|
Easy |
2809 |
MySQL Stored Procedure OUT Parameters II |
|
Easy |
2810 |
MySQL Stored Procedure INOUT Parameters I |
|
Easy |
2811 |
MySQL Stored Procedure INOUT Parameters II |
|
Easy |
2812 |
MySQL Stored Procedure Variables I |
|
Easy |
2813 |
Find the sum of even numbers 1 - 100 |
Java |
Naive |
2814 |
ASCII code corresponding characters (Java version) |
Java |
Naive |
2815 |
How long your savings will last |
Java |
Naive |
2816 |
Han Xin points out the troops |
Java |
Naive |
2817 |
Interconversion of doubles and strings |
Java |
Easy |
2818 |
Find the sum of the inverse diagonals of an array |
Java |
Easy |
2819 |
Determining prime numbers |
Java |
Easy |
2820 |
Sum of small numbers |
Java |
Easy |
2821 |
The disappearing number 6 |
Java |
Naive |
2822 |
Truncate the character with subscript 5 |
Java |
Naive |
2823 |
What Triangle is this |
Java |
Easy |
2824 |
Encrypted love letters |
Java |
Easy |
2825 |
Determine if strings are equal |
Java |
Naive |
2826 |
Friends of Number 2 |
Java |
Easy |
2827 |
Change string |
Java |
Naive |
2828 |
Splice strings and change to uppercase |
Java |
Naive |
2829 |
Simple cell phone number verification |
Java |
Naive |
2830 |
Disappearing strings |
Java |
Naive |
2831 |
Inverted strings |
Java |
Naive |
2832 |
A simple check of the mailbox format |
Java |
Easy |
2833 |
Compliant figures |
Java |
Naive |
2834 |
Simple string splitting |
Java |
Easy |
2835 |
Find the maximum and minimum values of two numbers |
Java |
Naive |
2836 |
Find the maximum value |
Java |
Naive |
2837 |
Copy the specified element |
Java |
Naive |
2838 |
Randomly generated numbers |
Java |
Naive |
2840 |
Simple string matching and replacement |
Java |
Easy |
2841 |
Please connect the charger |
Java |
Naive |
2842 |
The constructor without parameters (I) |
Java |
Naive |
2843 |
The constructor without parameters (II) |
Java |
Naive |
2844 |
Superfly |
Java |
Naive |
2845 |
Custom Exceptions - Java |
Java |
Naive |
2846 |
Reasonable permissions |
Java |
Easy |
2847 |
Teachers giving lessons to students |
Java |
Easy |
2848 |
Refining the right class |
Java |
Naive |
2849 |
Inverted arrays |
Java |
Naive |
2850 |
The constructor with parameters (I) |
Java |
Naive |
2851 |
New friends at the zoo |
Java |
Naive |
2852 |
Additional properties and methods of the Student class |
Java |
Naive |
2853 |
Common singleton pattern Class |
Java |
Easy |
2854 |
Custom annotations |
|
Easy |
2855 |
The constructor with parameters (II) |
Java |
Easy |
2856 |
Create Person abstract class |
Java |
Easy |
2857 |
Abstract Factory Pattern |
|
Medium |
2858 |
The wheels of the car |
Java |
Naive |
2859 |
Student implement 2 interfaces |
Java |
Naive |
2860 |
Implementing the interface |
Java |
Easy |
2861 |
Ride payment prompt (Interpreter Pattern) |
|
Medium |
2862 |
Calling internal classes |
Java |
Naive |
2863 |
Are the two people with the same name |
Java |
Easy |
2864 |
A week of rest day (I) |
Java |
Easy |
2865 |
Anonymous internal classes |
Java |
Naive |
2866 |
A week of rest day (II) |
Java |
Easy |
2867 |
A week of rest day (III) |
Java |
Easy |
2868 |
All objects |
Java |
Naive |
2869 |
Managing Books |
Java |
Naive |
2870 |
Variables of the interface |
Java |
Naive |
2871 |
Initialize class properties |
Java |
Naive |
2872 |
static Loaded code block |
Java |
Naive |
2873 |
Check code (I) |
Java |
Easy |
2874 |
Local Internal Classes |
Java |
Naive |
2875 |
Program results |
Java |
Naive |
2876 |
Sum of extreme differences |
Java |
Naive |
2877 |
Delete the smallest value in the set |
Java |
Naive |
2878 |
3 and multiples of 3 |
Java |
Naive |
2879 |
Output all key-value pairs in a Map |
Java |
Naive |
2880 |
AddData to a Map |
Java |
Easy |
2881 |
The largest number |
Java |
Easy |
2882 |
Honor roll for final exams |
Java |
Easy |
2883 |
A general commodity class |
Java |
Medium |
2884 |
A week of rest day (IV) |
Java |
Easy |
2885 |
Roster of classes |
Java |
Naive |
2886 |
Sorting a Map |
Java |
Naive |
2887 |
Student set with double sort |
Java |
Easy |
2888 |
Arrays merge |
Java |
Naive |
2889 |
Summation of arrays |
Java |
Naive |
2890 |
Alphabetical order |
Java |
Naive |
2891 |
Filtering elements in a collection |
Java |
Naive |
2892 |
Accessing elements |
Java |
Naive |
2893 |
Arrays with duplicate numbers |
Java |
Easy |
2894 |
Order by frequency |
Java |
Medium |
2895 |
Sum of two numbers II |
Java |
Naive |
2896 |
Use of generic classes |
Java |
Naive |
2897 |
Intercepting data using Queue |
Java |
Easy |
2898 |
Intercepting data using Stack |
Java |
Easy |
2899 |
LinkedList implementation of string reversal output |
Java |
Naive |
2900 |
LinkedList Removal of duplicate elements |
Java |
Naive |
2901 |
Array Copy |
Java |
Naive |
2902 |
Seating in order on the bus |
Java |
Medium |
2903 |
Use of generalized arrays |
Java |
Easy |
2904 |
Use of Generic Types |
Java |
Easy |
2905 |
Upper and lower bounds for generic types |
Java |
Naive |
2906 |
Thread-safe List |
Java |
Easy |
2907 |
A week of rest day (V) |
|
Medium |
2908 |
Replace Kth string |
|
Naive |
2909 |
Reverse String in K-Group |
|
Easy |
2910 |
Add a first level title Hello LintCode! |
HTML |
Naive |
2911 |
Adding class names |
HTML |
Naive |
2912 |
Production submission section |
HTML |
Naive |
2913 |
Colours in HTML |
CSS |
Naive |
2914 |
Writing an Ordered List |
HTML |
Naive |
2915 |
Adding CSS Styles |
CSS |
Naive |
2916 |
Writing an Unordered List |
HTML |
Naive |
2917 |
[Exercise] Logical operations between two variables |
|
Naive |
2918 |
Formatting Old Poems |
CSS |
Naive |
2919 |
Integer Operations 2 |
|
Naive |
2920 |
Get the input data and print it |
|
Naive |
2921 |
Completing the Navigation Menu with Tab Nesting |
HTML |
Naive |
2922 |
Make a Menu |
CSS HTML |
Easy |
2923 |
Define a list |
|
Naive |
2924 |
Define strings and numbers and print them |
|
Naive |
2925 |
Define a tuple |
|
Naive |
2926 |
Retrieve the month in the date string and add one(I) |
|
Naive |
2927 |
Number Classification |
|
Naive |
2928 |
Finding Common Multiples |
|
Naive |
2929 |
Find the most expensive items (list version) |
|
Naive |
2930 |
Writing a list to a file |
|
Naive |
2931 |
Read the dictionary from the file and modify it |
|
Naive |
2932 |
Print Student Grade Point Average |
|
Naive |
2933 |
Print student grade point average (exception version) |
|
Easy |
2934 |
Read csv file and modify |
|
Easy |
2935 |
The Disappearing Box |
CSS |
Naive |
2936 |
Handling Overflow Content |
CSS |
Naive |
2937 |
The rightmost 1 of a binary number |
|
Medium |
2938 |
Complete the chain table class (I) |
|
Medium |
2939 |
Complete the chain table class (II) |
|
Easy |
2940 |
Byte string and string interconversion |
|
Naive |
2942 |
Blocking people on the blacklist |
|
Naive |
2943 |
Making a Name Entry Box |
HTML |
Naive |
2945 |
Modifying the Style of In-Line Phrases |
CSS |
Naive |
2946 |
Positioning Sub-packagings |
CSS |
Naive |
2947 |
Determine if it is in the list |
|
Naive |
2948 |
Discounts for members |
|
Naive |
2949 |
Find the number that appears an odd number of times |
|
Easy |
2950 |
Check if it is the same object |
|
Naive |
2951 |
Find a right-angled side of a right triangle |
|
Naive |
2953 |
Implementing Button Styles |
|
Naive |
2955 |
Getting to know python deep and shallow copies |
|
Naive |
2956 |
Determine if a discount is available |
|
Naive |
2957 |
Setting the Type of the Input Element |
|
Naive |
2958 |
Fetch the numbers in the list for operation |
|
Naive |
2959 |
Find the average of the maximum values in each list |
|
Easy |
2960 |
Define a function |
|
Naive |
2961 |
Formatting Ancient Poems II |
CSS |
Naive |
2962 |
Initializing CSS |
CSS |
Naive |
2963 |
Colourful Input Boxes |
CSS |
Naive |
2965 |
Modifying the Mouse Cursor Style |
CSS |
Naive |
2966 |
Adding Text and Box Shadows |
|
Naive |
2967 |
Colourful Buttons |
CSS |
Naive |
2968 |
Text Omitted if Out of Width |
CSS |
Easy |
2971 |
Making of the Heart |
CSS |
Easy |
2972 |
Modify Opacity |
|
Naive |
2973 |
Relationship Selectors |
CSS |
Naive |
2974 |
The Relationship Selector II |
CSS |
Naive |
2975 |
Stylized Buttons |
CSS |
Easy |
2976 |
Adding a Progress Bar |
CSS HTML |
Naive |
2977 |
The Link Jump |
HTML |
Naive |
2978 |
Modifying the Outer Shape of a Figure |
CSS |
Naive |
2980 |
Setting the Margins of Boxes II |
CSS |
Naive |
2981 |
Different Rounded Corners |
CSS |
Naive |
2982 |
The Tenth Row that Never Goes |
CSS |
Naive |
2983 |
The Cool Button |
CSS |
Naive |
2984 |
Moving Black Blocks |
|
Naive |
2986 |
Units in CSS |
CSS |
Naive |
2987 |
Selecting dishes |
HTML |
Naive |
2988 |
Units in CSS II |
|
Naive |
2989 |
Choose a Favourite Course |
HTML |
Easy |
2990 |
The Cool Box |
CSS |
Naive |
2991 |
Adjusting Paragraph Size |
CSS |
Naive |
2992 |
Revising the Outline of a Paragraph |
|
Naive |
2993 |
Making a Christmas Tree |
CSS |
Naive |
2994 |
Modifying the Alignment of Paragraphs |
CSS |
Naive |
2995 |
Choose Your Favorite Animal |
|
Naive |
2996 |
Making a Student Information Form |
CSS HTML |
Naive |
2997 |
Modifying Case |
CSS |
Naive |
2998 |
Making a Horizontal Navigation Bar |
CSS HTML |
Easy |
2999 |
Making a Vertical Navigation Bar |
|
Easy |
3000 |
Making a Horizontal Navigation Bar (II) |
CSS |
Naive |
3001 |
Modifying Character Spacing |
|
Naive |
3002 |
Modifying Paragraph Indentations |
CSS |
Naive |
3003 |
The Dazzling Text |
CSS |
Naive |
3004 |
Revising Poetry Row High |
CSS |
Naive |
3005 |
Labels in Colour |
CSS |
Naive |
3006 |
Making a Note |
CSS |
Naive |
3007 |
Selecting Brother Headings and Paragraphs |
CSS |
Naive |
3008 |
The Box That Got Bigger |
CSS |
Naive |
3009 |
Crossing the Street |
CSS |
Naive |
3010 |
Modifying the Boldness of Fonts |
|
Naive |
3012 |
Making CSS Box Model |
|
Easy |
3013 |
The Many Ways to Distribute Left and Right |
CSS |
Easy |
3014 |
Making a Horizontal Navigation Bar III |
CSS |
Easy |
3015 |
Changing the Point of Origin |
CSS |
Naive |
3017 |
Modifying Text Size |
CSS |
Naive |
3018 |
Setting the Background Pattern Style |
CSS |
Naive |
3019 |
Modify Picture Style |
CSS HTML |
Naive |
3020 |
The Cutting Box |
CSS |
Naive |
3021 |
Choosing a Favourite Critter II |
HTML |
Easy |
3022 |
Making the Dice |
CSS |
Easy |
3023 |
The Extra Long Word |
CSS |
Naive |
3026 |
Modifying Boxes Borders |
CSS |
Naive |
3027 |
Tables for Colour Explosion |
CSS |
Naive |
3029 |
Modifying the Background Origin |
CSS |
Naive |
3044 |
Designing a Search Box |
CSS HTML |
Easy |
3048 |
Making a Login Form |
CSS HTML |
Easy |
3061 |
Basic structure of HTML |
HTML |
Naive |
3062 |
Print Hello World! |
PHP |
Naive |
3063 |
HTML Page Title Tag |
HTML |
Naive |
3064 |
Data Portfolio |
PHP |
Naive |
3065 |
Basic syntax of HTML |
HTML |
Naive |
3067 |
Easy Calculator |
PHP |
Naive |
3068 |
Exchange variables |
PHP |
Naive |
3069 |
Custom text content tags span |
HTML |
Naive |
3070 |
Progressive data |
PHP |
Naive |
3071 |
Image tags img |
HTML |
Naive |
3072 |
Horizontal line tag hr |
HTML |
Naive |
3073 |
Hello world! |
|
Naive |
3074 |
Parity judgment |
PHP |
Naive |
3075 |
Determining leap years (PHP version) |
PHP |
Naive |
3077 |
Paragraph tag p |
HTML |
Naive |
3078 |
Write route and view |
|
Naive |
3081 |
Standard input and output statements |
|
Naive |
3082 |
Branching Statements |
|
Naive |
3083 |
Custom Tag div |
HTML |
Naive |
3084 |
Loop statements |
|
Naive |
3085 |
Introduction to Functions |
|
Naive |
3086 |
Month days judgment |
PHP |
Naive |
3087 |
Frame tag iframe |
HTML |
Naive |
3088 |
Score Leveling |
PHP |
Naive |
3089 |
Variable definition exercise |
|
Naive |
3090 |
Common Structured Element Tags |
HTML |
Easy |
3091 |
Maximal Convention (php version) |
PHP |
Naive |
3092 |
Summation (PHP version) |
PHP |
Naive |
3093 |
Han Xin Points (PHP version) |
PHP |
Naive |
3094 |
Calculate the area of a circle |
|
Easy |
3095 |
Is it a letter? |
|
Easy |
3096 |
Is it a leap year? |
|
Easy |
3097 |
The sum of numbers that are not divisible by 7 |
PHP |
Naive |
3098 |
Button tag button |
HTML |
Naive |
3099 |
Implement Polls application Model |
|
Easy |
3100 |
Text field tag textarea |
HTML |
Naive |
3101 |
Make the model modifiable in admin |
|
Naive |
3102 |
Binary digits of an integer |
|
Easy |
3103 |
Write URLconf |
|
Easy |
3104 |
Drop-down menu tag select |
HTML |
Naive |
3105 |
Take absolute value |
|
Easy |
3106 |
Label wrap input box label |
HTML |
Naive |
3107 |
Write URLconf (Bug Fix) |
|
Naive |
3108 |
Movie Rating |
|
Easy |
3109 |
Customize background management |
|
Naive |
3110 |
String Splicings |
PHP |
Naive |
3111 |
String case conversion |
PHP |
Easy |
3112 |
Printable Ninety-Nine Multiplication Table |
|
Easy |
3113 |
HTML Character Entities |
HTML |
Naive |
3114 |
Word Searchs |
PHP |
Naive |
3115 |
Wrong echo string |
PHP |
Naive |
3116 |
Invalid IP address |
PHP |
Naive |
3118 |
HTML colors |
HTML |
Naive |
3119 |
HTML & CSS |
HTML |
Naive |
3120 |
Thread Control Logic |
|
Medium |
3121 |
Adaptive Access between Company A and Company B |
|
Easy |
3122 |
String escaping |
PHP |
Naive |
3123 |
Normative words |
PHP |
Naive |
3124 |
Knock Seven |
|
Easy |
3125 |
Repeat Strings |
PHP |
Naive |
3126 |
Guess the number |
|
Easy |
3127 |
How many times is 2 squared? |
|
Easy |
3132 |
Summation |
PHP |
Naive |
3133 |
Remove empty folders |
|
Naive |
3134 |
Is it a prime number? |
|
Easy |
3135 |
CalculatorⅠ |
|
Easy |
3136 |
CalculatorⅡ |
|
Easy |
3137 |
Split tuple |
|
Naive |
3138 |
Number of occurrences of the element in the tuple |
|
Naive |
3139 |
The largest element in the set |
|
Naive |
3140 |
Set Operations |
|
Naive |
3141 |
The sum of the elements in the set whose absolute value is less than 10 |
|
Naive |
3142 |
The number of different values in the dictionary |
|
Naive |
3143 |
Dictionary size after merging |
|
Naive |
3144 |
Replace list elements according to dictionary |
|
Naive |
3145 |
Creating arrays |
PHP |
Naive |
3146 |
First and last numbers |
PHP |
Naive |
3147 |
Ordered arrays |
PHP |
Naive |
3148 |
Using lambda function to construct quadratic polynomial with one variable |
|
Naive |
3149 |
Add the two numbers together |
|
Naive |
3150 |
Array length |
PHP |
Naive |
3151 |
Most frequently occurring words |
PHP |
Naive |
3152 |
String conversion |
PHP |
Naive |
3153 |
Deck Generation |
|
Medium |
3154 |
Discounted Travel with Transit Card |
|
Naive |
3155 |
package file |
|
Naive |
3156 |
Area of a circle (macro definition) |
|
Naive |
3157 |
Unzip the zip file |
|
Naive |
3158 |
Using lambda function to get sum of list |
|
Easy |
3159 |
True or False Number |
PHP |
Naive |
3160 |
Middle Numbers |
PHP |
Naive |
3161 |
Summation of integer arrays |
PHP |
Naive |
3162 |
Sort members by age |
|
Naive |
3163 |
The maximum value of the array |
PHP |
Naive |
3164 |
Rename the imported file with the same name |
|
Naive |
3165 |
Pointer exercise |
|
Naive |
3166 |
Sum the absolute values of two numbers (Python version) |
|
Naive |
3167 |
Alternating sums (Python version) |
|
Naive |
3168 |
Addition, subtraction, multiplication and division two numbers |
|
Naive |
3169 |
Collatz conjecture (Python version) |
|
Naive |
3170 |
Find the first integer whose square is greater than n |
|
Naive |
3171 |
Find the number in 1 - n that can be divided by x |
|
Naive |
3172 |
Sum of multiples of 7 with final number of 2 (Python version) |
|
Naive |
3173 |
Adding two numbers (pointer and reference) |
|
Easy |
3174 |
The number of elements whose value is a multiple of its index (Python version) |
|
Naive |
3175 |
Number of tuples that form a triangle |
|
Naive |
3176 |
Print the noon time point of the corresponding date |
|
Naive |
3177 |
Definition of functions |
PHP |
Naive |
3178 |
Exchange of numbers |
PHP |
Naive |
3179 |
Parameter Printing |
PHP |
Naive |
3180 |
String flipping |
PHP |
Naive |
3181 |
Anonymous functions |
PHP |
Naive |
3182 |
Callback functions |
PHP |
Naive |
3183 |
Ten years later |
PHP |
Naive |
3184 |
Date Formatting |
PHP |
Naive |
3185 |
Get the timestamp of the date |
PHP |
Naive |
3186 |
Definition of Class |
PHP |
Naive |
3187 |
Student Information |
PHP |
Naive |
3188 |
Create constructor |
PHP |
Naive |
3189 |
Define a subclass |
PHP |
Naive |
3190 |
Save student information |
PHP |
Easy |
3191 |
Definition of abstract classes |
PHP |
Naive |
3192 |
Implementation of the interface |
PHP |
Naive |
3193 |
Delete message prompt |
PHP |
Naive |
3194 |
Calling a method that does not exist |
PHP |
Naive |
3195 |
Confirming the identity of the class |
PHP |
Naive |
3196 |
Division operations |
PHP |
Naive |
3197 |
Custom Exception Classes |
PHP |
Naive |
3198 |
Invalid objects |
PHP |
Naive |
3199 |
Customized error handling |
PHP |
Naive |
3200 |
Accessing arrays |
|
Naive |
3201 |
Accessing two-dimensional arrays |
|
Naive |
3202 |
Array traversal |
|
Naive |
3203 |
Accessing character arrays |
|
Easy |
3204 |
Character arrays to size |
|
Easy |
3205 |
String-to-Size |
|
Easy |
3206 |
String Slicing |
|
Easy |
3207 |
Adding elements |
|
Naive |
3208 |
String splitting |
|
Easy |
3209 |
Moving fruit |
|
Medium |
3210 |
Train access |
|
Medium |
3211 |
Queue |
|
Naive |
3212 |
Is there this student? |
|
Naive |
3213 |
Define the student structure |
|
Naive |
3214 |
Read student information |
|
Easy |
3215 |
Pointer traversal of arrays |
|
Easy |
3220 |
Define The Student Model I |
|
Naive |
3227 |
Define The Book Model II |
|
Naive |
3228 |
Output ASCII values of input lowercase letters in sequence |
|
Naive |
3229 |
Define The Book Model I |
|
Naive |
3230 |
Find duplicate mailboxes |
|
Naive |
3231 |
Define The Student Model II |
|
Naive |
3232 |
Implement Class application Model |
|
Naive |
3239 |
Update the table contents and output the updated table |
|
Naive |
3240 |
Count the number of Letters of each type |
Java |
Easy |
3241 |
Query the number of students for the web course |
|
Naive |
3242 |
Print "LintCode" |
Java |
Naive |
3243 |
Equivalent String |
|
Easy |
3244 |
Implement Band application Model |
|
Easy |
3247 |
Design Time Class |
|
Naive |
3263 |
Sort Student models |
|
Naive |
3267 |
Design Circle Related Methods |
|
Naive |
3269 |
Set joint constraints on Student model |
|
Naive |
3278 |
Format Book read count |
|
Naive |
3279 |
Show book name and author |
|
Naive |
3285 |
Print Encapsulated Student Information |
|
Naive |
3298 |
Inherit and Print Student Information |
|
Naive |
3300 |
Using the Transportation Method |
|
Naive |
3324 |
Tree-shaped Relationships within the Company |
|
Easy |
3327 |
Fast Food Ordering System |
|
Medium |
3329 |
PC Peripheral Accessor (Java) |
|
Medium |
3330 |
Fitness Course Builder (Java) |
|
Easy |
3331 |
Contracting of Actors |
|
Easy |
3332 |
Different Drinking Experience |
|
Naive |
3333 |
Singleton Pattern Using Enumerations (Java) |
|
Easy |
3334 |
Package Clone |
|
Naive |
3336 |
Multimedia Playback Adapter (Java) |
|
Medium |
3338 |
File System Design |
|
Medium |
3340 |
Tool to Determine If String Is Empty |
|
Naive |
3341 |
Restore Game Archive |
|
Easy |
3344 |
Using the Shape Factory to Calculate the Area of Various Shapes OOD |
|
Easy |
3345 |
Initialize the Person Class |
|
Naive |
3349 |
Initialize the Animals Class (C++) |
|
Naive |
3350 |
Abstract Factory for Making Milk Tea (Java) |
|
Medium |
3354 |
Application of Synchronized - Alternate Printing |
|
Easy |
3356 |
Equivalent String (Python) |
|
Easy |
3357 |
Print Student Information |
|
Naive |
3364 |
Application of Keyword Volatile - Printing Incremental Numbers |
|
Easy |
3365 |
Rewrite the model save() method |
|
Easy |
3366 |
Implement Restaurant application Model |
|
Easy |
3367 |
Create Model - Custom Manager |
|
Easy |
3368 |
Sorting String With Lambda Expression |
Java |
Easy |
3369 |
Create Model - Add Model Method |
|
Easy |
3370 |
Create a User Object |
|
Naive |
3371 |
Modify all book information |
|
Easy |
3372 |
Query the book information of the specified author name |
|
Easy |
3373 |
Check the author of books and sort in descending order |
|
Easy |
3374 |
Query the information of the first n books in the order of reading times |
|
Easy |
3375 |
Query the student information according to the score range and sort it in ascending order |
|
Easy |
3376 |
Check the information of students whose test score are greater than or equal to N times the general score |
|
Easy |
3377 |
Wrapping of Animals Class (C++) |
|
Naive |
3378 |
Sort student information in ascending order by total score |
|
Easy |
3379 |
Designing the Person Class |
|
Naive |
3380 |
Check the information of students whose general score and test score are greater than or equal to 60 |
|
Easy |
3381 |
Check the information of students whose general score or test score are greater than or equal to a specific value |
|
Easy |
3382 |
Update the course total score of all students |
|
Easy |
3383 |
Update and query the student information of the specified conditions |
|
Medium |
3384 |
Delete student information according to sno |
|
Easy |
3385 |
Delete associated model objects according to keywords |
|
Hard |
3386 |
Query the information of students passing the course |
|
Hard |
3387 |
Query the information of n students who passed the course but whose scores are reciprocal |
|
Easy |
3390 |
Custom Templates |
|
Easy |
3392 |
Control Smart Curtains (Java) |
|
Easy |
3395 |
Menu of Various Permissions OOD (Java) |
|
Medium |
3398 |
Shared Website Templates (Java) |
|
Medium |
3400 |
Perimeter and Area of a Square |
|
Naive |
3402 |
Linked List Instantiation |
|
Easy |
3404 |
Online Coffee Shopping Platform |
|
Medium |
3405 |
Web Server Configuration Whitelist |
|
Easy |
3407 |
Fire Alarm |
|
Easy |
3408 |
Queue Instantiation |
|
Easy |
3410 |
Game Progress Saving (Python) |
|
Easy |
3411 |
Mediator of Housing Rental (Java) |
|
Medium |
3412 |
Approval Chain for Leave Requests (Java) |
|
Medium |
3413 |
Digital Wallet |
|
Medium |
3414 |
Issuance and Execution of Tasks |
|
Medium |
3417 |
Analog Guitar |
|
Easy |
3418 |
Pharmacy Business System |
|
Medium |
3419 |
Elevator Controller |
|
Easy |
3421 |
A Design of Student Course Selection System (Java) |
|
Hard |
3422 |
Brush and Shape |
|
Medium |
3423 |
Beverage Refilling Business |
|
Easy |
3424 |
Python Implementation Stack |
|
Naive |
3425 |
Multi-person Self-introduction |
|
Easy |
3426 |
Output of The Number of Objects |
|
Naive |
3427 |
Furniture Placement Problem |
|
Easy |
3428 |
Company Leave Request System |
|
Medium |
3429 |
Recommended Merchants (Java) |
|
Hard |
3430 |
A Design of Unmanned Vending Supermarket (Java) |
|
Hard |
3431 |
Designing Company Organization Structure |
|
Medium |
3432 |
Restaurant Ordering System |
|
Hard |
3433 |
Stock Inquiry Client |
|
Easy |
3435 |
Determining the Relationship between Circle and Point |
|
Easy |
3436 |
The Magician Exchanges the Poker in both Hands |
|
Easy |
3437 |
Performance of Multiple Instruments |
|
Naive |
3438 |
Warehouse Management System |
|
Hard |
3439 |
Serialized User Model and Group Model |
|
Naive |
3440 |
Implementation of User Model and Group Model ViewSet |
|
Naive |
3441 |
Registered User and Group ViewSet Routing |
|
Naive |
3442 |
Serialized Blog Model |
|
Easy |
3443 |
Serialized Blog Model II |
|
Easy |
3444 |
Implement Blog View Function |
|
Easy |
3445 |
Implement Blog View Function II |
|
Easy |
3446 |
Automatic Coffee Maker |
|
Easy |
3447 |
Implement Blog View Class |
|
Easy |
3448 |
Implement Blog View Class II |
|
Easy |
3449 |
Automatic Coffee Maker II |
|
Easy |
3450 |
Implement Blog application view class |
|
Medium |
3451 |
Stock of Vending Machines |
|
Easy |
3452 |
Add Blog Application View Class Permissions |
|
Hard |
3453 |
Create Hyperlink Path |
|
Medium |
3454 |
Fruit Packaging Factory |
|
Easy |
3455 |
Iterator for Linked List |
|
Easy |
3456 |
Receptionist at Pet Store |
|
Easy |
3457 |
Create a Thread to Splice Words |
|
Naive |
3458 |
Print Hello LintCode in Thread |
|
Naive |
3459 |
Stop a Running Thread |
|
Naive |
3460 |
Determine If a Thread Is Stopped |
|
Naive |
3461 |
Creation of Multitasking Threads |
|
Easy |
3462 |
Thread’s Working Ways |
|
Naive |
3463 |
Putting Thread to Sleep |
|
Naive |
3464 |
Custom Thread Wrapper |
|
Easy |
3465 |
Force a New Thread to Execute |
|
Naive |
3466 |
Changing the Priority of a Thread |
|
Naive |
3467 |
Create a Daemon Thread |
|
Naive |
3468 |
Thread Passing Parameters |
|
Naive |
3469 |
Transfer Thread Ownership |
|
Naive |
3470 |
Swap Thread |
|
Naive |
3471 |
Data Concurrent Modification Protection |
|
Naive |
3472 |
Remove the Deadlock Relationship |
|
Naive |
3473 |
Timeout Attempt on Mutex |
|
Naive |
3474 |
Box for Storing Data from Different Threads |
|
Easy |
3475 |
Incrementing and Modifying Values in an Array at the Same Time |
|
Easy |
3476 |
Print Values in Two Arrays Alternately |
|
Easy |
3477 |
1 Producer and 1 Consumer |
|
Easy |
3478 |
Create a Thread Pool to Perform a Specified Amount of Tasks |
|
Easy |
3479 |
Shutdown the Thread Pool |
|
Naive |
3480 |
Complete Array |
Python |
Easy |
3481 |
Find the Index of the Maximum Value |
|
Easy |
3482 |
The Only Thread-safe Call |
|
Naive |
3483 |
Create an Asynchronous Task |
|
Naive |
3484 |
Create a Custom Thread Pool to Execute Tasks |
|
Easy |
3485 |
Asynchronous Result Sharing |
|
Naive |
3486 |
Customizing Thread Pool Rejection Policy |
|
Easy |
3487 |
Custom Asynchronous Results |
|
Naive |
3488 |
Print in Order |
|
Easy |
3489 |
Convert Asynchronous Tasks |
|
Naive |
3490 |
Synchronization of Workers' Tasks |
|
Easy |
3491 |
Synchronization of Workers' Tasks II |
|
Easy |
3492 |
Design of the Spinlock |
|
Naive |
3493 |
Longest Subarray |
|
Medium |
3494 |
Simulation of Station Gates |
|
Easy |
3495 |
Family Fruit |
|
Medium |
3496 |
Family Fruit II |
|
Hard |
3497 |
Print Values of Two Arrays Alternately II |
|
Easy |
3498 |
Supply Products |
|
Medium |
3499 |
Supply Products II |
|
Medium |
3500 |
Dividing Line |
|
Easy |
3501 |
The best sales |
|
Easy |
3502 |
Implementation of CountDownLatch |
|
Easy |
3503 |
Supply Products III |
|
Medium |
3504 |
Implementation of Semaphore |
|
Easy |
3505 |
Product Combination |
|
Medium |
3506 |
Implementation of Barrier |
|
Easy |
3507 |
Compute and Remove Spaces from a String |
|
Naive |
3508 |
First-Come First-Served |
|
Easy |
3509 |
Implementation of CyclicBarrier |
|
Medium |
3510 |
Display Full Name Synchronously |
|
Easy |
3511 |
Implementing a Message Pop-Up Component |
|
Easy |
3512 |
Implementation of the TODO List |
|
Medium |
3513 |
Implementation of the TODO List II |
|
Hard |
3514 |
Shortest Job First |
|
Medium |
3515 |
Highest Response Ratio Next |
|
Medium |
3516 |
Shortest Remaining Time Next |
|
Hard |
3517 |
Implementation of Parallel Search Algorithm |
|
Medium |
3518 |
Solving for roots and powers of positive integers |
|
Naive |
3519 |
Average Salary |
|
Naive |
3520 |
Implementation of Parallel Bubble Sort Algorithm |
|
Easy |
3521 |
Control Style Scopes |
|
Naive |
3522 |
Hello Vue |
|
Naive |
3523 |
Vue Class Bindings |
|
Naive |
3524 |
Render All List Elements |
|
Naive |
3525 |
Vue Style Bindings |
|
Naive |
3526 |
Dependency Injection (Provide) |
|
Easy |
3527 |
Dependency Injection (Injection) |
|
Easy |
3528 |
Transition Effect |
|
Medium |
3530 |
Process List And Render |
|
Naive |
3531 |
Vue Conditional Rendering |
|
Naive |
3532 |
Vue Conditional Rendering II |
|
Naive |
3533 |
Design Data Self-Increment And Self-Decrement Buttons |
|
Naive |
3534 |
Teleport |
|
Medium |
3535 |
Use of Text Interpolation |
|
Naive |
3536 |
Insert Raw HTML Code |
|
Naive |
3537 |
Make Form Text Box |
|
Naive |
3538 |
Sort and Filter Grid Component Implementation |
|
Hard |
3539 |
Make Form Selection Box |
|
Naive |
3540 |
Bind Click Event to Buttons |
|
Naive |
3541 |
Tree View Component Implementation |
|
Hard |
3542 |
Non-Negative Prefix Sum |
|
Easy |
3543 |
Dynamically Bind Class Names for Paragraphs |
|
Naive |
3544 |
Exam Progress |
TypeScript |
Easy |
3545 |
Vue Props |
|
Easy |
3546 |
Dynamically Bind Styles for Paragraphs |
|
Naive |
3547 |
Matrix Override |
|
Medium |
3548 |
Vue Slots |
|
Naive |
3549 |
Vue Emits |
|
Easy |
3550 |
Vue Dynamic Components |
|
Easy |
3551 |
Vue Global Component Registration |
|
Easy |
3552 |
Interesting Triples |
|
Medium |
3553 |
Importing Components |
|
Naive |
3554 |
Default & Named Slots |
|
Easy |
3555 |
Defining and Using Components |
|
Naive |
3556 |
Scoped Slots |
|
Easy |
3557 |
Counting Button Clicks |
|
Easy |
3558 |
Vue Local Component Registration |
|
Easy |
3559 |
Customized Subcomponents |
|
Easy |
3560 |
Bind Keyboard Events to Input Boxes |
|
Naive |
3561 |
Form Input Bindings |
|
Naive |
3562 |
Single-File Component |
|
Naive |
3563 |
Component Two-Way Binding |
|
Naive |
3564 |
List and Object Traversal |
|
Naive |
3565 |
Polling Display Title |
|
Naive |
3566 |
Local Registration of Components |
|
Naive |
3567 |
Global Registration of Components |
|
Naive |
3568 |
Provide |
|
Naive |
3569 |
Inject |
|
Naive |
3570 |
Computed |
|
Naive |
3571 |
Named Slot |
|
Naive |
3572 |
Slot |
|
Naive |
3573 |
Transition Style Binding |
|
Naive |
3574 |
List Transition Animation |
|
Naive |
3575 |
Dynamic Components |
|
Naive |
3576 |
Add Data to Button Component |
|
Naive |
3577 |
Define Properties of the Component |
|
Naive |
3578 |
KeepAlive |
|
Naive |
3579 |
Caching Components and Switching Between Them |
|
Easy |
3580 |
Implementing Content Polling Button |
|
Naive |
3581 |
External Teleport |
|
Naive |
3582 |
A Fake Counter |
|
Naive |
3583 |
Watch Property |
|
Naive |
3584 |
Observing the Impact of Quantity Changes in the Shopping Cart |
|
Easy |
3585 |
Calculate Average and Array Sum |
|
Naive |
3586 |
Virtual DOM |
|
Naive |
3587 |
Render Functions |
|
Naive |
3588 |
Priority of Rendering Options |
|
Naive |
3589 |
Use ref(), toRef(), and unref() to Manage Data |
|
Easy |
3590 |
Count the Number of Characters |
|
Naive |
3591 |
Basic Use of Mixins |
|
Easy |
3592 |
Customized Commands |
|
Naive |
3593 |
Record List Element Log |
|
Easy |
3594 |
Implementation of Multiple Delete Function in Table |
|
Easy |
3595 |
Deserialize Binary Tree |
|
Medium |
3596 |
Order Volume for Each Time Period |
|
Medium |
3597 |
Lowest Common Ancestor IV |
|
Hard |
3598 |
Sum of Two Linked Lists |
TypeScript |
Easy |
3599 |
Remove Repeated Letters |
|
Medium |
3600 |
Fix Binary Search Tree |
|
Medium |
3601 |
Cumulative Number |
TypeScript |
Medium |
3602 |
The Largest Sum Divisible by Three |
TypeScript |
Medium |
3603 |
Longest Nice Subarray |
|
Medium |
3604 |
The Minimum String After Swapping |
|
Medium |
3605 |
Shift 2D Grid |
|
Easy |
3606 |
Query the Middle Node ID |
|
Medium |
3607 |
Number of Students Passing the Exam |
|
Easy |
3608 |
Overall Approval Rate of Friend Requests |
|
Medium |
3609 |
Who Has the Most Friends |
|
Medium |
3610 |
Courses Taken by All Students |
|
Easy |
3611 |
My Best Friend |
|
Medium |
3612 |
Product Prices for the Specified Date |
|
Medium |
3613 |
Search For Students Ranked Second to Fifth |
|
Easy |
3614 |
Check the Referrals of Customers |
|
Easy |
3615 |
Data Median |
|
Medium |
3616 |
Combined Course Transcripts |
|
Easy |
3617 |
Replacement of Seats for Two Consecutive Persons |
|
Medium |
3618 |
Time-Consuming Top Three Tasks |
|
Easy |
3619 |
Project Subtask |
|
Hard |
3620 |
Logger Rate Limiter |
|
Easy |
3621 |
Fixed Point |
TypeScript |
Easy |
3622 |
Read N Characters Given Read4 |
|
Easy |
3623 |
Sum of Digits in the Minimum Number |
TypeScript |
Easy |
3624 |
Count Substrings with Only One Distinct Letter |
TypeScript |
Easy |
3625 |
Index Pairs of a String |
|
Medium |
3626 |
How Many Apples Can You Put into the Basket |
TypeScript |
Easy |
3627 |
Find All The Lonely Nodes |
TypeScript |
Easy |
3628 |
Highest Five Subject Average |
TypeScript |
Easy |
3629 |
Intersection of Three Sorted Arrays |
TypeScript |
Easy |
3630 |
Two Sum Less Than Target |
TypeScript |
Easy |
3631 |
Remove Vowels From String |
TypeScript |
Easy |
3632 |
Delete n Nodes After m Nodes of a Linked List |
TypeScript |
Easy |
3633 |
Missing Number In Arithmetic Progression |
TypeScript |
Easy |
3634 |
Largest Unique Number |
TypeScript |
Easy |
3635 |
Largest Subarray Length k |
TypeScript |
Easy |
3636 |
Array Transformation |
TypeScript |
Easy |
3637 |
Problematic Sensor |
|
Easy |
3638 |
Single-Row Keyboard |
TypeScript |
Easy |
3639 |
Check If a String Be Split into Value-Equal Substrings |
TypeScript |
Easy |
3640 |
Hexspeak |
TypeScript |
Easy |
3641 |
Sport Plan Performance |
TypeScript |
Easy |
3642 |
Counting Elements |
TypeScript |
Easy |
3643 |
Whether the Array Is a Consecutive Array |
TypeScript |
Easy |
3644 |
Check If a Number is Majority Element in an Array |
TypeScript |
Easy |
3645 |
Perform String Shifts |
TypeScript |
Easy |
3646 |
Count Houses on a Circular Street |
|
Easy |
3647 |
Design Compressed String Iterator |
Java |
Easy |
3648 |
Reverse Words in a String IV |
|
Medium |
3649 |
Find the Sum of Two Nodes of Two BST |
TypeScript |
Medium |
3650 |
Absolutely Continuous Numbers |
TypeScript |
Medium |
3651 |
Number of Connected Components in an Undirected Graph |
TypeScript |
Medium |
3652 |
Shortest Way to Form String |
TypeScript |
Medium |
3653 |
Meeting Scheduler |
|
Medium |
3654 |
Toss Coins |
|
Medium |
3655 |
Minimize Rounding Error to Meet Target |
|
Medium |
3656 |
Design Snake Game |
|
Medium |
3657 |
All Paths Can Pass from Start to End |
|
Medium |
3658 |
Website Crawler |
|
Medium |
3659 |
Design Phone Directory |
Java |
Easy |
3660 |
Competition Leaderboard |
|
Medium |
3661 |
Missing Element in Sorted Array |
|
Medium |
3662 |
Design Hit Counter |
Java |
Easy |
3663 |
Diameter of an Undirected Tree |
|
Medium |
3664 |
Longest Repeating Substring |
|
Medium |
3665 |
Inorder Successor in BST II |
|
Medium |
3666 |
Campus Bikes II |
|
Hard |
3667 |
Encode Number |
TypeScript |
Medium |
3668 |
Bracket Expansion |
TypeScript |
Medium |
3669 |
Smallest Common Region |
|
Medium |
3670 |
The Earliest Moment When Everyone Become Friends |
|
Medium |
3671 |
Replace the Synonyms in the Sentence |
|
Medium |
3672 |
Connecting Cities With Minimum Cost |
|
Medium |
3673 |
Parallel Courses |
|
Medium |
3674 |
Printing Immutable Linked List in Reverse Order |
Python |
Medium |
3675 |
Minimum Swaps to Group All 1's Together |
TypeScript |
Medium |
3676 |
Analyze User Website Visit Pattern |
|
Medium |
3677 |
Design File System |
|
Medium |
3678 |
Delete Interval |
|
Medium |
3679 |
Shortest Distance to Target Color |
TypeScript |
Medium |
3680 |
Before and After Puzzle |
TypeScript |
Medium |
3681 |
Delete Nodes of Tree |
|
Medium |
3682 |
Knight Shortest Path IV |
|
Medium |
3683 |
Columns with at Least a One on the Leftmost Side |
|
Medium |
3684 |
Find Smallest Common Element in All Rows |
TypeScript |
Medium |
3685 |
First Unique Integer |
|
Medium |
3686 |
Diameter of N-Ary Tree |
|
Medium |
3687 |
Check If an Array Is a Valid Sequence |
TypeScript |
Medium |
3688 |
Strings Differ by One Character |
TypeScript |
Medium |
3689 |
Put Boxes Into the Warehouse |
|
Medium |
3690 |
Clone Binary Tree II |
|
Medium |
3691 |
Dot Product of Two Sparse Vectors |
Python |
Easy |
3692 |
Put Boxes Into the Warehouse II |
|
Medium |
3693 |
Clone N-branch Tree |
|
Medium |
3694 |
Nonnegative Subarray |
TypeScript |
Easy |
3695 |
Nonnegative Subarray II |
TypeScript |
Medium |
3696 |
Inverse Subarray |
TypeScript |
Easy |
3697 |
Find Subscripts |
TypeScript |
Easy |
3698 |
The Leftmost Smaller Number |
TypeScript |
Easy |
3699 |
Clear the String |
|
Medium |
3701 |
Find Nearest Right Node in Binary Tree |
Python |
Medium |
3702 |
Maximum Sum Queries |
|
Hard |
3703 |
Count Number of Rectangles Containing Each Point |
|
Medium |
3704 |
Count Good Triplets in Array |
|
Hard |
3705 |
Minimum Moves to Make Array Complementary |
|
Medium |
3706 |
Number of Pairs That Satisfy the Condition |
TypeScript |
Hard |
3707 |
Corporate Flight Bookings |
TypeScript |
Medium |
3708 |
Minimum Number of Increments on Subarrays to Form a Target Array |
|
Hard |
3709 |
Minimum Number of Visited Lattices in a Matrix |
|
Hard |
3710 |
Design Most Recently Used Queue |
|
Medium |
3711 |
Delete the Problem Node in a Binary Tree |
|
Medium |
3712 |
Maximum Subarray Sum After Squaring An Element |
TypeScript |
Medium |
3713 |
Change the Root of a Binary Tree |
|
Medium |
3714 |
Buildings With an Ocean View |
TypeScript |
Easy |
3715 |
Lowest Common Ancestor V |
|
Medium |
3716 |
Longest Perfect Palindromic Subsequence |
|
Medium |
3717 |
The Number of Distinct Substrings |
|
Medium |
3718 |
Sort Features by Popularity |
TypeScript |
Medium |
3719 |
Shortest Path to Get Bubble Tea |
TypeScript |
Medium |
3720 |
Count Pairs of Equal Substrings With Minimum Difference |
|
Medium |
3721 |
Maximum Number of Study Groups |
|
Medium |
3722 |
Calculate the Distance Between Two Nodes in a Binary Tree |
TypeScript |
Medium |
3723 |
Remove Duplicates from Unsorted List II |
TypeScript |
Medium |
3724 |
Distinct Numbers in Each Subarray |
TypeScript |
Medium |
3725 |
Calculate the Depth of BST Based on the Order of Insertions |
|
Medium |
3726 |
Rotting Oranges |
TypeScript |
Medium |
3727 |
Shortest Path in the Maze |
|
Medium |
3728 |
Longest Word With All Prefixed |
|
Medium |
3729 |
Implement Trie II |
Python |
Medium |
3730 |
Product of Two Run-Length Encoded Arrays |
TypeScript |
Medium |
3731 |
Minimize Product Sum of Two Arrays |
TypeScript |
Medium |
3732 |
Minimum Path Cost in a Maze |
|
Medium |
3733 |
Count Pairs in Two Arrays |
TypeScript |
Medium |
3734 |
Cutting Ribbons |
TypeScript |
Medium |
3735 |
Bash Game II |
|
Medium |
3736 |
Kth Smallest Subarray Sum |
|
Medium |
3737 |
Find Maximum Values Among All Minimum Values of Subarrays |
|
Medium |
3738 |
Longest Common Subsequence Between Sorted Arrays |
|
Medium |
3739 |
Binary Searchable Numbers in an Unsorted Array |
|
Medium |
3740 |
Calculate the Number of Nodes Equal to Sum of Child Nodes |
TypeScript |
Medium |
3741 |
Widest Pair of Indices With Equal Range Sum |
TypeScript |
Medium |
3742 |
Maximum Number of People Can Be Caught in a Game |
TypeScript |
Easy |
3743 |
Smallest Greater Multiple Made of Two Digits |
TypeScript |
Medium |
3744 |
Calculate the Average Height of Buildings in Each Region |
|
Medium |
3745 |
Brightest Position on Street |
TypeScript |
Medium |
3746 |
Count the Number of Subarrays Where 1 Appears More than 0 |
TypeScript |
Medium |
3747 |
Maximum Alternating Subarray Sum |
|
Medium |
3748 |
Number of Spaces the Robot Can Clean |
|
Medium |
3749 |
Reorder Absolute Value Linked List |
TypeScript |
Medium |
3750 |
Minimum Cost of Dividing the Sentence into Lines |
|
Medium |
3751 |
Number of Equal Count Substrings |
TypeScript |
Medium |
3752 |
Number of Substrings That Start and End with the Same Letter |
|
Easy |
3753 |
Maze of Confusion |
|
Medium |
3754 |
Largest Even Sum of Subsequences with Length K |
|
Medium |
3755 |
Minimum Cost to Reach City With Discounts |
|
Medium |
3756 |
Number of Unique Flavors Remaining After Sharing K Candies |
|
Medium |
3762 |
First C Code: Print Hello World |
|
Naive |
3763 |
C Variable Definition Exercise |
|
Naive |
3764 |
C Variable Definition Exercise II |
|
Naive |
3765 |
Print "Hello World" with Quotation Mark |
|
Naive |
3766 |
A+B in Different Binaries |
|
Naive |
3767 |
Print File Path |
|
Naive |
3768 |
Determine Odd or Even Number |
|
Naive |
3769 |
Judging Leap Year (C version) |
|
Naive |
3770 |
Processing Data |
|
Naive |
3771 |
Reverse Integer (C version) |
|
Easy |
3772 |
Find all the daffodils (C version) |
|
Naive |
3773 |
Print nine-nine multiplication table (C version) |
|
Easy |
3774 |
Determining Prime Number |
|
Easy |
3775 |
Find the Greatest Common Divisor (C version) |
|
Easy |
3776 |
Finding the Least Common Multiples (C version) |
|
Easy |
3777 |
Output Data by Format |
|
Naive |
3778 |
First String Containing Only Letters |
|
Easy |
3780 |
Output The Month According to The Number |
|
Naive |
3781 |
Read Data on Demand |
|
Easy |