1 |
Two Sum |
Java |
100 |
|
2 |
Add Two Numbers |
Java |
80 |
|
3 |
Longest Substring Without Repeating Characters |
Java |
|
这个系列的所有题都要多做几遍 |
4 |
Median of Two Sorted Arrays |
Java |
70 |
这题很经典,多做几遍 |
5 |
Longest Palindromic Substring |
Java |
85 |
这题对比动态规划和最优算法 |
6 |
ZigZag Conversion |
Java |
|
|
7 |
Reverse Integer |
Java |
95 |
|
8 |
String to Integer (atoi) |
Java |
90 |
很考代码能力,容易错 |
9 |
Palindrome Number |
Java |
|
|
10 |
Regular Expression Matching |
Java |
60 |
这题很经典,多做几遍,和#44一起 |
11 |
Container With Most Water |
Java |
|
|
12 |
Integer to Roman |
Java |
|
|
13 |
Roman to Integer |
Java |
|
|
14 |
Longest Common Prefix |
Java |
|
|
15 |
3Sum |
Java |
70 |
|
16 |
3Sum Closest |
Java |
|
|
17 |
Letter Combinations of a Phone Number |
Java |
85 |
|
18 |
4Sum |
Java |
|
|
19 |
Remove Nth Node From End of List |
Java |
|
|
20 |
Valid Parentheses |
Java |
100 |
|
21 |
Merge Two Sorted Lists |
Java |
90 |
|
22 |
Generate Parentheses |
Java |
80 |
这题看两遍 |
23 |
Merge k Sorted Lists |
Java |
70 |
|
24 |
Swap Nodes in Pairs |
Java |
|
|
25 |
Reverse Nodes in k-Group |
Java |
80 |
|
26 |
Remove Duplicates from Sorted Array |
Java |
80 |
|
27 |
Remove Element |
Java |
|
|
28 |
Implement strStr() |
Java |
70 |
|
29 |
Divide Two Integers |
Java |
|
|
30 |
Substring with Concatenation of All Words |
Java |
|
|
31 |
Next Permutation |
Java |
|
|
32 |
Longest Valid Parentheses |
Java |
|
|
33 |
Search in Rotated Sorted Array |
Java |
80 |
|
34 |
Search for a Range |
Java |
|
|
35 |
Search Insert Position |
Java |
|
|
36 |
Valid Sudoku |
Java |
80 |
|
37 |
Sudoku Solver |
Java |
70 |
这道题是典型的back tracking,多做几遍 |
38 |
Count and Say |
Java |
80 |
|
39 |
Combination Sum |
Java |
70 |
排列组合系列的题要多做几遍 |
40 |
Combination Sum II |
Java |
70 |
|
41 |
First Missing Positive |
Java |
|
|
42 |
Trapping Rain Water |
Java |
95 |
|
43 |
Multiply Strings |
Java |
80 |
|
44 |
Wildcard Matching |
Java |
60 |
和#10多做几遍 |
45 |
Jump Game II |
Java |
|
|
46 |
Permutations |
Java |
|
|
47 |
Permutations II |
Java |
70 |
多做几遍 |
48 |
Rotate Image |
Java |
100 |
|
49 |
Group Anagrams |
Java |
95 |
|
50 |
Pow(x, n) |
Java |
80 |
|
51 |
N-Queens |
Java |
|
|
52 |
N-Queens II |
Java |
|
|
53 |
Maximum Subarray |
Java |
95 |
|
54 |
Spiral Matrix |
Java |
85 |
|
55 |
Jump Game |
Java |
|
|
56 |
Merge Intervals |
Java |
70 |
|
57 |
Insert Interval |
Java |
75 |
这题要多做几遍 |
60 |
Permutation Sequence |
Java |
70 |
这题思路巧妙,多做两遍 |
61 |
Rotate List |
Java |
90 |
|
66 |
Plus One |
Java |
100 |
这题多看一遍 |
67 |
Add Binary |
Java |
100 |
|
68 |
Text Justification |
Java |
|
|
69 |
Sqrt(x) |
Java |
85 |
|
71 |
Simplify Path |
Java |
80 |
|
72 |
Edit Distance |
Java |
75 |
|
73 |
Set Matrix Zeroes |
Java |
90 |
|
74 |
Search a 2D Matrix |
Java |
|
|
75 |
Sort Colors |
Java |
65 |
这题多做几遍,很有意思 |
76 |
Minimum Window Substring |
Java |
50 |
这题以及类似的题一定要多做几遍,很经典,参见window |
77 |
Combinations |
Java |
|
|
78 |
Subsets |
Java |
85 |
|
79 |
Word Search |
Java |
85 |
|
80 |
Remove Duplicates from Sorted Array II |
Java |
100 |
|
81 |
Search in Rotated Sorted Array II |
Java |
70 |
|
82 |
Remove Duplicates from Sorted List II |
Java |
75 |
|
83 |
Remove Duplicates from Sorted List |
Java |
100 |
|
84 |
Largest Rectangle in Histogram |
Java |
70 |
|
85 |
Maximal Rectangle |
Java |
75 |
|
86 |
Partition List |
Java |
90 |
|
88 |
Merge Sorted Array |
Java |
100 |
|
90 |
Subsets II |
Java |
80 |
|
91 |
Decode Ways |
Java |
75 |
这题多做几遍,包括#639 |
92 |
Reverse Linked List II |
Java |
80 |
|
93 |
Restore IP Addresses |
Java |
80 |
多看两遍 |
94 |
Binary Tree Inorder Traversal |
Java |
100 |
|
95 |
Unique Binary Search Trees II |
Java |
70 |
多做几遍,递归和DP |
96 |
Unique Binary Search Trees |
Java |
80 |
|
98 |
Validate Binary Search Tree |
Java |
85 |
注意溢出 |
99 |
Recover Binary Search Tree |
Java |
60 |
这题很容易错,要多做几遍 |
100 |
Same Tree |
Java |
100 |
|
101 |
Symmetric Tree |
Java |
95 |
|
102 |
Binary Tree Level Order Traversal |
Java |
85 |
|
103 |
Binary Tree Zigzag Level Order Traversal |
Java |
80 |
|
104 |
Maximum Depth of Binary Tree |
Java |
100 |
|
105 |
Construct Binary Tree from Preorder and Inorder Traversal |
Java |
95 |
|
106 |
Construct Binary Tree from Inorder and Postorder Traversal |
Java |
90 |
|
107 |
Binary Tree Level Order Traversal II |
Java |
100 |
|
108 |
Convert Sorted Array to Binary Search Tree |
Java |
100 |
|
109 |
Convert Sorted List to Binary Search Tree |
Java |
90 |
|
110 |
Balanced Binary Tree |
Java |
80 |
|
111 |
Minimum Depth of Binary Tree |
Java |
80 |
|
112 |
Path Sum |
Java |
85 |
|
113 |
Path Sum II |
Java |
65 |
错了好几次,得多做几遍 |
114 |
Flatten Binary Tree to Linked List |
Java |
80 |
|
116 |
Populating Next Right Pointers in Each Node |
Java |
80 |
|
117 |
Populating Next Right Pointers in Each Node II |
Java |
80 |
|
118 |
Pascal's Triangle |
Java |
80 |
|
119 |
Pascal's Triangle II |
Java |
80 |
|
121 |
Best Time to Buy and Sell Stock |
Java |
100 |
|
122 |
Best Time to Buy and Sell Stock II |
Java |
100 |
|
123 |
Best Time to Buy and Sell Stock III |
Java |
75 |
|
124 |
Binary Tree Maximum Path Sum |
Java |
60 |
|
125 |
Valid Palindrome |
Java |
100 |
|
126 |
Word Ladder II |
Java |
|
|
127 |
Word Ladder |
Java |
70 |
此题非常经典,务必连同ii多做几遍,将双端BFS吃透 |
128 |
Longest Consecutive Sequence |
Java |
60 |
|
129 |
Sum Root to Leaf Numbers |
Java |
100 |
|
130 |
Surrounded Regions |
Java |
65 |
|
131 |
Palindrome Partitioning |
Java |
|
|
132 |
Palindrome Partitioning II |
Java |
|
|
133 |
Clone Graph |
Java |
70 |
这题不难,多看两遍,BFS方法再做两遍 |
135 |
Candy |
Java |
80 |
|
138 |
Copy List with Random Pointer |
Java |
95 |
有一个易错点 |
139 |
Word Break |
Java |
80 |
多看两遍 |
140 |
Word Break II |
Java |
75 |
这题多做两遍,很典型 |
141 |
Linked List Cycle |
Java |
75 |
|
142 |
Linked List Cycle II |
Java |
90 |
|
143 |
Reorder List |
Java |
90 |
|
144 |
Binary Tree Preorder Traversal |
Java |
85 |
|
145 |
Binary Tree Postorder Traversal |
Java |
80 |
|
146 |
LRU Cache |
Java |
95 |
好题目,多做几遍 |
147 |
Insertion Sort List |
Java |
90 |
|
148 |
Sort List |
Java |
90 |
|
149 |
Max Points on a Line |
Java |
60 |
|
150 |
Evaluate Reverse Polish Notation |
Java |
70 |
|
151 |
Reverse Words in a String |
Java |
70 |
这题虽然不难,但是也错了几次 |
152 |
Maximum Product Subarray |
Java |
|
|
153 |
Find Minimum in Rotated Sorted Array |
Java |
|
|
154 |
Find Minimum in Rotated Sorted Array II |
Java |
|
|
155 |
Min Stack |
Java |
95 |
|
156 |
Binary Tree Upside Down |
Java |
70 |
这道题挺有意思,多做几遍 |
157 |
Read N Characters Given Read4 |
Java |
80 |
这题多做几遍,结合#158 |
158 |
Read N Characters Given Read4 II - Call multiple times |
Java |
70 |
|
159 |
Longest Substring with At Most Two Distinct Characters |
Java |
100 |
多看两遍 |
160 |
Intersection of Two Linked Lists |
Java |
100 |
|
161 |
One Edit Distance |
Java |
85 |
和#72做两遍 |
162 |
Find Peak Element |
Java |
90 |
|
163 |
Missing Ranges |
Java |
65 |
多做几遍,太容易错了 |
164 |
Maximum Gap |
Java |
65 |
|
167 |
Two Sum II - Input array is sorted |
Java |
100 |
|
168 |
Excel Sheet Column Title |
Java |
|
|
169 |
Majority Element |
Java |
100 |
|
170 |
Two Sum III - Data structure design |
Java |
100 |
这道题再多做一遍 |
171 |
Excel Sheet Column Number |
Java |
|
|
172 |
Factorial Trailing Zeroes |
Java |
100 |
|
173 |
Binary Search Tree Iterator |
Java |
70 |
多留意一下 |
179 |
Largest Number |
Java |
90 |
|
186 |
Reverse Words in a String II |
Java |
90 |
|
188 |
Best Time to Buy and Sell Stock IV |
Java |
|
|
189 |
Rotate Array |
Java |
100 |
|
190 |
Reverse Bits |
Java |
85 |
|
198 |
House Robber |
Java |
80 |
|
199 |
Binary Tree Right Side View |
Java |
80 |
|
200 |
Number of Islands |
Java |
85 |
这道题很经典,而且方法不止一种,每种方法都多做几遍,包括UF,#305 |
203 |
Remove Linked List Elements |
Java |
|
|
204 |
Count Primes |
Java |
85 |
|
206 |
Reverse Linked List |
Java |
90 |
|
207 |
Course Schedule |
Java |
100 |
典型的拓扑排序 |
208 |
Implement Trie (Prefix Tree) |
Java |
80 |
和#211多留意,trie很典型 |
209 |
Minimum Size Subarray Sum |
Java |
85 |
|
210 |
Course Schedule II |
Java |
95 |
|
211 |
Add and Search Word - Data structure design |
Java |
85 |
|
212 |
Word Search II |
Java |
|
|
213 |
House Robber II |
Java |
80 |
|
214 |
Shortest Palindrome |
Java |
|
|
215 |
Kth Largest Element in an Array |
Java |
65 |
这题很经典,三种解法都要了然于胸 |
216 |
Combination Sum III |
Java |
65 |
|
217 |
Contains Duplicate |
Java |
100 |
|
218 |
The Skyline Problem |
Java |
60 |
这题多做两遍 |
219 |
Contains Duplicate II |
Java |
95 |
|
220 |
Contains Duplicate III |
Java |
65 |
|
221 |
Maximal Square |
Java |
80 |
|
222 |
Count Complete Tree Nodes |
Java |
70 |
一般的做法会超时 |
223 |
Rectangle Area |
Java |
95 |
|
224 |
Basic Calculator |
Java |
80 |
|
225 |
Implement Stack using Queues |
Java |
90 |
|
226 |
Invert Binary Tree |
Java |
80 |
|
228 |
Summary Ranges |
Java |
70 |
|
229 |
Majority Element II |
Java |
70 |
|
230 |
Kth Smallest Element in a BST |
Java |
85 |
注意Follow Up |
232 |
Implement Queue using Stacks |
Java |
95 |
|
233 |
Number of Digit One |
Java |
|
|
234 |
Palindrome Linked List |
Java |
75 |
|
235 |
Lowest Common Ancestor of a Binary Search Tree |
Java |
100 |
|
236 |
Lowest Common Ancestor of a Binary Tree |
Java |
50 |
这题很经典,多做几遍,留意节点不在树中的情况 |
237 |
Delete Node in a Linked List |
Java |
100 |
|
238 |
Product of Array Except Self |
Java |
85 |
|
239 |
Sliding Window Maximum |
Java |
75 |
这题非常经典,多做几遍,包括常规算法(优先队列,treemap)及优化算法双端队列 |
240 |
Search a 2D Matrix II |
Java |
100 |
|
241 |
Different Ways to Add Parentheses |
Java |
|
|
242 |
Valid Anagram |
Java |
100 |
|
243 |
Shortest Word Distance |
Java |
80 |
|
244 |
Shortest Word Distance II |
Java |
80 |
|
245 |
Shortest Word Distance III |
Java |
80 |
|
246 |
Strobogrammatic Number |
Java |
70 |
#247一个系列,多看两遍 |
247 |
Strobogrammatic Number II |
Java |
70 |
多看两遍 |
249 |
Group Shifted Strings |
Java |
|
|
250 |
Count Univalue Subtrees |
Java |
70 |
这题要多做几遍 |
251 |
Flatten 2D Vector |
Java |
100 |
|
252 |
Meeting Rooms |
Java |
100 |
|
253 |
Meeting Rooms II |
Java |
90 |
|
254 |
Factor Combinations |
Java |
80 |
|
255 |
Verify Preorder Sequence in Binary Search Tree |
Java |
85 |
很简单,粗心错了 |
256 |
Paint House |
Java |
95 |
|
257 |
Binary Tree Paths |
Java |
80 |
|
259 |
3Sum Smaller |
Java |
95 |
这题虽然简单,但是因为思维定式还是错了几次 |
261 |
Graph Valid Tree |
Java |
70 |
这题多做几遍 |
263 |
Ugly Number |
Java |
85 |
|
264 |
Ugly Number II |
Java |
70 |
|
265 |
Paint House II |
Java |
60 |
|
266 |
Palindrome Permutation |
Java |
100 |
|
267 |
Palindrome Permutation II |
Java |
80 |
典型,多看两遍 |
268 |
Missing Number |
Java |
100 |
|
269 |
Alien Dictionary |
Java |
70 |
这题要多做几遍 |
270 |
Closest Binary Search Tree Value |
Java |
90 |
|
271 |
Encode and Decode Strings |
Java |
65 |
思路巧妙,多看几遍 |
272 |
Closest Binary Search Tree Value II |
Java |
60 |
这题非常值得多做几遍,几种写法都试试 |
273 |
Integer to English Words |
Java |
75 |
多做几遍,做到bug free |
274 |
H-Index |
Java |
80 |
|
275 |
H-Index II |
Java |
75 |
|
277 |
Find the Celebrity |
Java |
100 |
|
278 |
First Bad Version |
Java |
100 |
|
279 |
Perfect Squares |
Java |
95 |
|
280 |
Wiggle Sort |
Java |
80 |
思路巧妙,多看两遍 |
281 |
Zigzag Iterator |
Java |
85 |
多做三遍,考虑扩展到k的情况 |
282 |
Expression Add Operators |
Java |
50 |
|
283 |
Move Zeroes |
Java |
100 |
|
284 |
Peeking Iterator |
Java |
100 |
|
285 |
Inorder Successor in BST |
Java |
70 |
这道题有意思,要多做几遍 |
286 |
Walls and Gates |
Java |
70 |
多看两遍 |
287 |
Find the Duplicate Number |
Java |
|
|
288 |
Unique Word Abbreviation |
Java |
70 |
这题不难,多做两遍,题目意思容易理解错 |
289 |
Game of Life |
Java |
70 |
|
293 |
Flip Game |
Java |
90 |
|
294 |
Flip Game II |
Java |
90 |
|
295 |
Find Median from Data Stream |
Java |
|
|
297 |
Serialize and Deserialize Binary Tree |
Java |
80 |
好题目,多做做,递归的非递归的 |
298 |
Binary Tree Longest Consecutive Sequence |
Java |
70 |
多做三遍,尽可能简洁 |
299 |
Bulls and Cows |
Java |
|
|
300 |
Longest Increasing Subsequence |
Java |
|
|
301 |
Remove Invalid Parentheses |
Java |
70 |
比较难,多做几遍 |
302 |
Smallest Rectangle Enclosing Black Pixels |
Java |
|
|
303 |
Range Sum Query - Immutable |
Java |
100 |
|
304 |
Range Sum Query 2D - Immutable |
Java |
65 |
|
305 |
Number of Islands II |
Java |
70 |
这题多做几遍,经典的UF |
307 |
Range Sum Query - Mutable |
Java |
70 |
和#303, #304, #308定要多做几遍,掌握BIT |
308 |
Range Sum Query 2D - Mutable |
Java |
70 |
|
309 |
Best Time to Buy and Sell Stock with Cooldown |
Java |
|
|
310 |
Minimum Height Trees |
Java |
60 |
这题多做几遍 |
311 |
Sparse Matrix Multiplication |
Java |
80 |
|
312 |
Burst Balloons |
Java |
60 |
|
313 |
Super Ugly Number |
Java |
|
|
314 |
Binary Tree Vertical Order Traversal |
Java |
80 |
|
315 |
Count of Smaller Numbers After Self |
Java |
60 |
|
316 |
Remove Duplicate Letters |
Java |
70 |
|
317 |
Shortest Distance from All Buildings |
Java |
75 |
典型的bfs,多做两遍 |
319 |
Bulb Switcher |
Java |
90 |
|
320 |
Generalized Abbreviation |
Java |
70 |
这题是典型的back tracking,多做几遍 |
322 |
Coin Change |
Java |
80 |
|
323 |
Number of Connected Components in an Undirected Graph |
Java |
90 |
典型的图,多看两遍 |
324 |
Wiggle Sort II |
Java |
60 |
|
325 |
Maximum Size Subarray Sum Equals k |
Java |
75 |
这题思路有意思,多做几遍 |
328 |
Odd Even Linked List |
Java |
90 |
|
329 |
Longest Increasing Path in a Matrix |
Java |
70 |
这题要多做几遍 |
332 |
Reconstruct Itinerary |
Java |
|
|
333 |
Largest BST Subtree |
Java |
50 |
这道题虽然不难,但是折腾了很久,一定要多做 |
334 |
Increasing Triplet Subsequence |
Java |
75 |
|
335 |
Self Crossing |
Java |
80 |
|
336 |
Palindrome Pairs |
Java |
|
|
337 |
House Robber III |
Java |
70 |
建议再做两遍 |
339 |
Nested List Weight Sum |
Java |
|
|
340 |
Longest Substring with At Most K Distinct Characters |
Java |
80 |
和#159类似 |
341 |
Flatten Nested List Iterator |
Java |
75 |
这题有点意思,多做两遍 |
344 |
Reverse String |
Java |
100 |
|
345 |
Reverse Vowels of a String |
Java |
100 |
|
346 |
Moving Average from Data Stream |
Java |
95 |
|
347 |
Top K Frequent Elements |
Java |
85 |
|
349 |
Intersection of Two Arrays |
Java |
|
|
350 |
Intersection of Two Arrays II |
Java |
|
|
351 |
Android Unlock Patterns |
Java |
70 |
这题多做几遍 |
357 |
Count Numbers with Unique Digits |
Java |
|
|
358 |
Rearrange String k Distance Apart |
Java |
|
|
359 |
Logger Rate Limiter |
Java |
100 |
这题如果不考虑空间消耗的话其实很简单 |
361 |
Bomb Enemy |
Java |
65 |
这题多做几遍,开始没思路 |
364 |
Nested List Weight Sum II |
Java |
|
|
366 |
Find Leaves of Binary Tree |
Java |
60 |
这道题刚开始还没思路 |
367 |
Valid Perfect Square |
Java |
|
|
369 |
Plus One Linked List |
Java |
100 |
|
370 |
Range Addition |
Java |
80 |
|
373 |
Find K Pairs with Smallest Sums |
Java |
|
|
374 |
Guess Number Higher or Lower |
Java |
100 |
|
375 |
Guess Number Higher or Lower II |
Java |
60 |
|
377 |
Combination Sum IV |
Java |
65 |
|
378 |
Kth Smallest Element in a Sorted Matrix |
Java |
|
|
380 |
Insert Delete GetRandom O(1) |
Java |
75 |
这道题很有意思,多做几遍 |
381 |
Insert Delete GetRandom O(1) - Duplicates allowed |
Java |
|
|
382 |
Linked List Random Node |
Java |
|
|
384 |
Shuffle an Array |
Java |
75 |
|
387 |
First Unique Character in a String |
Java |
100 |
|
388 |
Longest Absolute File Path |
Java |
65 |
其实不难,乍看没思路,多做几遍 |
391 |
Perfect Rectangle |
Java |
70 |
这题很trick,多做两遍 |
393 |
UTF-8 Validation |
Java |
60 |
错了很多次,多做几遍 |
394 |
Decode String |
Java |
75 |
这题容易错,多做四遍 |
395 |
Longest Substring with At Least K Repeating Characters |
Java |
65 |
|
398 |
Random Pick Index |
Java |
80 |
|
399 |
Evaluate Division |
Java |
60 |
这题多做几遍 |
401 |
Binary Watch |
Java |
|
|
404 |
Sum of Left Leaves |
Java |
80 |
|
406 |
Queue Reconstruction by Height |
Java |
60 |
这题开始没思路,多做几遍 |
407 |
Trapping Rain Water II |
Java |
|
|
408 |
Valid Word Abbreviation |
Java |
80 |
多做两遍 |
409 |
Longest Palindrome |
Java |
|
|
410 |
Split Array Largest Sum |
Java |
|
|
412 |
Fizz Buzz |
Java |
100 |
|
413 |
Third Maximum Number |
Java |
80 |
|
418 |
Sentence Screen Fitting |
Java |
65 |
这题思路巧妙,多做几遍,常规思路超时 |
422 |
Valid Word Square |
Java |
90 |
|
425 |
Word Squares |
Java |
70 |
这题很典型,多做几遍 |
436 |
Find Right Interval |
Java |
|
|
437 |
Path Sum III |
Java |
60 |
这道题错了很多遍,要重点关注 |
438 |
Find All Anagrams in a String |
Java |
75 |
这道题非常经典,最优解法需要多做几遍,保证once bug free |
442 |
Find All Duplicates in an Array |
Java |
80 |
|
445 |
Add Two Numbers II |
Java |
80 |
|
448 |
Find All Numbers Disappeared in an Array |
Java |
80 |
|
449 |
Serialize and Deserialize BST |
Java |
90 |
和#297一样 |
450 |
Delete Node in a BST |
Java |
60 |
这题非常经典,值得多做十遍 |
451 |
Sort Characters By Frequency |
Java |
|
|
459 |
Repeated Substring Pattern |
Java |
|
|
477 |
Total Hamming Distance |
Java |
|
|
480 |
Sliding Window Median |
Java |
70 |
|
482 |
License Key Formatting |
Java |
90 |
|
483 |
Smallest Good Base |
Java |
|
|
485 |
Max Consecutive Ones |
Java |
100 |
|
487 |
Max Consecutive Ones II |
Java |
80 |
|
501 |
Find Mode in Binary Search Tree |
Java |
70 |
不难,容易错,多做两次 |
508 |
Most Frequent Subtree Sum |
Java |
|
|
513 |
Find Bottom Left Tree Value |
Java |
100 |
|
515 |
Find Largest Value in Each Tree Row |
Java |
100 |
|
524 |
Longest Word in Dictionary through Deleting |
Java |
|
|
526 |
Beautiful Arrangement |
Java |
80 |
|
535 |
Encode and Decode TinyURL |
Java |
100 |
|
538 |
Convert BST to Greater Tree |
Java |
100 |
|
541 |
Reverse String II |
Java |
100 |
|
543 |
Diameter of Binary Tree |
Java |
80 |
这题易错 |
547 |
Friend Circles |
Java |
70 |
|
557 |
Reverse Words in a String III |
Java |
100 |
|
560 |
Subarray Sum Equals K |
Java |
70 |
|
563 |
Binary Tree Tilt |
Java |
90 |
|
564 |
Find the Closest Palindrome |
Java |
80 |
此题暴力法即可 |
572 |
Subtree of Another Tree |
Java |
80 |
|
606 |
Construct String from Binary Tree |
Java |
90 |
|
617 |
Merge Two Binary Trees |
Java |
100 |
很简单 |
621 |
Task Scheduler |
Java |
70 |
|
637 |
Average of Levels in Binary Tree |
Java |
100 |
|
652 |
Find Duplicate Subtrees |
Java |
70 |
开始还没思路 |
653 |
Two Sum IV - Input is a BST |
Java |
90 |
|
654 |
Maximum Binary Tree |
Java |
100 |
|
669 |
Trim a Binary Search Tree |
Java |
100 |
|
681 |
Next Closest Time |
Java |
80 |
这题多做几遍 |
683 |
K Empty Slots |
Java |
80 |
|
684 |
Redundant Connection |
Java |
|
|
687 |
Longest Univalue Path |
Java |
70 |
|
695 |
Max Area of Island |
Java |
100 |
|
703 |
Kth Largest Element in a Stream |
Java |
100 |
|
771 |
Jewels and Stones |
Java |
100 |
|
814 |
Binary Tree Pruning |
Java |
80 |
|
819 |
Most Common Word |
Java |
85 |
|
843 |
Guess the Word |
Java |
90 |
|
844 |
Backspace String Compare |
Java |
100 |
|
849 |
Maximize Distance to Closest Person |
Java |
80 |
|
857 |
Minimum Cost to Hire K Workers |
Java |
70 |
|
872 |
Leaf-Similar Trees |
Java |
80 |
|
889 |
Construct Binary Tree from Preorder and Postorder Traversal |
Java |
80 |
|
904 |
Fruit Into Baskets |
Java |
90 |
|
929 |
Unique Email Addresses |
Java |
90 |
|