| 0001 |
Two Sum |
Go, Python, JavaScript |
Easy |
| 0002 |
Add Two Numbers |
Python, JavaScript |
Medium |
| 0003 |
Longest Substring Without Repeating Characters |
Python, JavaScript |
Medium |
| 0004 |
Median of Two Sorted Arrays |
Python, JavaScript |
Hard |
| 0005 |
Longest Palindromic Substring |
Python, JavaScript |
Medium |
| 0006 |
ZigZag Conversion |
Python, JavaScript |
Medium |
| 0007 |
Reverse Integer |
Go, Python, JavaScript |
Easy |
| 0008 |
String to Integer (atoi) |
JavaScript |
Medium |
| 0009 |
Palindrome Number |
Go, Python, JavaScript |
Easy |
| 0010 |
Regular Expression Matching |
JavaScript |
Hard |
| 0011 |
Container With Most Water |
Python, JavaScript |
Medium |
| 0012 |
Integer to Roman |
JavaScript |
Medium |
| 0013 |
Roman to Integer |
JavaScript |
Easy |
| 0014 |
Longest Common Prefix |
Python, JavaScript |
Easy |
| 0015 |
3Sum |
JavaScript |
Medium |
| 0016 |
3Sum Closest |
JavaScript |
Medium |
| 0017 |
Letter Combinations of a Phone Number |
JavaScript |
Medium |
| 0018 |
4Sum |
JavaScript |
Medium |
| 0019 |
Remove Nth Node From End of List |
JavaScript |
Medium |
| 0020 |
Valid Parentheses |
JavaScript, Python |
Easy |
| 0021 |
Merge Two Sorted Lists |
JavaScript, Python |
Easy |
| 0022 |
Generate Parentheses |
JavaScript |
Medium |
| 0023 |
Merge k Sorted Lists |
JavaScript |
Hard |
| 0024 |
Swap Nodes in Pairs |
Python, JavaScript |
Medium |
| 0025 |
Reverse Nodes in k-Group |
JavaScript |
Hard |
| 0026 |
Remove Duplicates from Sorted Array |
JavaScript |
Easy |
| 0027 |
Remove Element |
JavaScript |
Easy |
| 0028 |
Implement strStr() |
JavaScript |
Easy |
| 0029 |
Divide Two Integers |
JavaScript |
Medium |
| 0030 |
Substring with Concatenation of All Words |
JavaScript |
Hard |
| 0031 |
Next Permutation |
JavaScript |
Medium |
| 0032 |
Longest Valid Parentheses |
JavaScript |
Hard |
| 0033 |
Search in Rotated Sorted Array |
JavaScript |
Medium |
| 0034 |
Find First and Last Position of Element in Sorted Array |
JavaScript |
Medium |
| 0035 |
Search Insert Position |
JavaScript |
Easy |
| 0036 |
Valid Sudoku |
JavaScript |
Medium |
| 0037 |
Sudoku Solver |
JavaScript |
Hard |
| 0038 |
Count and Say |
Python |
Easy |
| 0039 |
Combination Sum |
|
Medium |
| 0040 |
Combination Sum II |
|
Medium |
| 0041 |
First Missing Positive |
|
Hard |
| 0042 |
Trapping Rain Water |
JavaScript |
Hard |
| 0043 |
Multiply Strings |
|
Medium |
| 0044 |
Wildcard Matching |
|
Hard |
| 0045 |
Jump Game II |
|
Hard |
| 0046 |
Permutations |
JavaScript |
Medium |
| 0047 |
Permutations II |
|
Medium |
| 0048 |
Rotate Image |
|
Medium |
| 0049 |
Group Anagrams |
|
Medium |
| 0050 |
Pow(x, n) |
|
Medium |
| 0051 |
N-Queens |
JavaScript |
Hard |
| 0052 |
N-Queens II |
|
Hard |
| 0053 |
Maximum Subarray |
Python, JavaScript |
Easy |
| 0054 |
Spiral Matrix |
|
Medium |
| 0055 |
Jump Game |
|
Medium |
| 0056 |
Merge Intervals |
|
Medium |
| 0057 |
Insert Interval |
|
Hard |
| 0058 |
Length of Last Word |
JavaScript |
Easy |
| 0059 |
Spiral Matrix II |
|
Medium |
| 0060 |
Permutation Sequence |
|
Medium |
| 0061 |
Rotate List |
|
Medium |
| 0062 |
Unique Paths |
|
Medium |
| 0063 |
Unique Paths II |
|
Medium |
| 0064 |
Minimum Path Sum |
|
Medium |
| 0065 |
Valid Number |
|
Hard |
| 0066 |
Plus One |
Python |
Easy |
| 0067 |
Add Binary |
|
Easy |
| 0068 |
Text Justification |
|
Hard |
| 0069 |
Sqrt(x) |
JavaScript |
Easy |
| 0070 |
Climbing Stairs |
Python |
Easy |
| 0071 |
Simplify Path |
JavaScript |
Medium |
| 0072 |
Edit Distance |
|
Hard |
| 0073 |
Set Matrix Zeroes |
|
Medium |
| 0074 |
Search a 2D Matrix |
|
Medium |
| 0075 |
Sort Colors |
|
Medium |
| 0076 |
Minimum Window Substring |
|
Hard |
| 0077 |
Combinations |
|
Medium |
| 0078 |
Subsets |
JavaScript |
Medium |
| 0079 |
Word Search |
|
Medium |
| 0080 |
Remove Duplicates from Sorted Array II |
|
Medium |
| 0081 |
Search in Rotated Sorted Array II |
|
Medium |
| 0082 |
Remove Duplicates from Sorted List II |
Python |
Medium |
| 0083 |
Remove Duplicates from Sorted List |
Python |
Easy |
| 0084 |
Largest Rectangle in Histogram |
|
Hard |
| 0085 |
Maximal Rectangle |
|
Hard |
| 0086 |
Partition List |
|
Medium |
| 0087 |
Scramble String |
|
Hard |
| 0088 |
Merge Sorted Array |
Python |
Easy |
| 0089 |
Gray Code |
|
Medium |
| 0090 |
Subsets II |
|
Medium |
| 0091 |
Decode Ways |
|
Medium |
| 0092 |
Reverse Linked List II |
Python |
Medium |
| 0093 |
Restore IP Addresses |
JavaScript |
Medium |
| 0094 |
Binary Tree Inorder Traversal |
Python, JavaScript |
Medium |
| 0095 |
Unique Binary Search Trees II |
|
Medium |
| 0096 |
Unique Binary Search Trees |
|
Medium |
| 0097 |
Interleaving String |
|
Hard |
| 0098 |
Validate Binary Search Tree |
JavaScript |
Medium |
| 0099 |
Recover Binary Search Tree |
|
Hard |
| 0100 |
Same Tree |
Python |
Easy |
| 0101 |
Symmetric Tree |
|
Easy |
| 0102 |
Binary Tree Level Order Traversal |
Python |
Medium |
| 0103 |
Binary Tree Zigzag Level Order Traversal |
Python |
Medium |
| 0104 |
Maximum Depth of Binary Tree |
Python, JavaScript |
Easy |
| 0105 |
Construct Binary Tree from Preorder and Inorder Traversal |
|
Medium |
| 0106 |
Construct Binary Tree from Inorder and Postorder Traversal |
|
Medium |
| 0107 |
Binary Tree Level Order Traversal II |
|
Easy |
| 0108 |
Convert Sorted Array to Binary Search Tree |
|
Easy |
| 0109 |
Convert Sorted List to Binary Search Tree |
|
Medium |
| 0110 |
Balanced Binary Tree |
Python |
Easy |
| 0111 |
Minimum Depth of Binary Tree |
|
Easy |
| 0112 |
Path Sum |
|
Easy |
| 0113 |
Path Sum II |
|
Medium |
| 0114 |
Flatten Binary Tree to Linked List |
|
Medium |
| 0115 |
Distinct Subsequences |
|
Hard |
| 0116 |
Populating Next Right Pointers in Each Node |
|
Medium |
| 0117 |
Populating Next Right Pointers in Each Node II |
|
Medium |
| 0118 |
Pascal's Triangle |
|
Easy |
| 0119 |
Pascal's Triangle II |
|
Easy |
| 0120 |
Triangle |
|
Medium |
| 0121 |
Best Time to Buy and Sell Stock |
JavaScript, Python |
Easy |
| 0122 |
Best Time to Buy and Sell Stock II |
JavaScript |
Easy |
| 0123 |
Best Time to Buy and Sell Stock III |
|
Hard |
| 0124 |
Binary Tree Maximum Path Sum |
|
Hard |
| 0125 |
Valid Palindrome |
|
Easy |
| 0126 |
Word Ladder II |
|
Hard |
| 0127 |
Word Ladder |
|
Medium |
| 0128 |
Longest Consecutive Sequence |
|
Hard |
| 0129 |
Sum Root to Leaf Numbers |
|
Medium |
| 0130 |
Surrounded Regions |
|
Medium |
| 0131 |
Palindrome Partitioning |
|
Medium |
| 0132 |
Palindrome Partitioning II |
|
Hard |
| 0133 |
Clone Graph |
|
Medium |
| 0134 |
Gas Station |
|
Medium |
| 0135 |
Candy |
|
Hard |
| 0136 |
Single Number |
JavaScript |
Easy |
| 0137 |
Single Number II |
|
Medium |
| 0138 |
Copy List with Random Pointer |
|
Medium |
| 0139 |
Word Break |
|
Medium |
| 0140 |
Word Break II |
|
Hard |
| 0141 |
Linked List Cycle |
|
Easy |
| 0142 |
Linked List Cycle II |
JavaScript |
Medium |
| 0143 |
Reorder List |
|
Medium |
| 0144 |
Binary Tree Preorder Traversal |
|
Medium |
| 0145 |
Binary Tree Postorder Traversal |
|
Hard |
| 0146 |
LRU Cache |
JavaScript |
Medium |
| 0147 |
Insertion Sort List |
|
Medium |
| 0148 |
Sort List |
Python, JavaScript |
Medium |
| 0149 |
Max Points on a Line |
|
Hard |
| 0150 |
Evaluate Reverse Polish Notation |
|
Medium |
| 0151 |
Reverse Words in a String |
|
Medium |
| 0152 |
Maximum Product Subarray |
|
Medium |
| 0153 |
Find Minimum in Rotated Sorted Array |
|
Medium |
| 0154 |
Find Minimum in Rotated Sorted Array II |
|
Hard |
| 0155 |
Min Stack |
JavaScript |
Easy |
| 0156 |
Binary Tree Upside Down |
|
Medium |
| 0157 |
Read N Characters Given Read4 |
|
Easy |
| 0158 |
Read N Characters Given Read4 II - Call multiple times |
|
Hard |
| 0159 |
Longest Substring with At Most Two Distinct Characters |
|
Hard |
| 0160 |
Intersection of Two Linked Lists |
|
Easy |
| 0161 |
One Edit Distance |
|
Medium |
| 0162 |
Find Peak Element |
|
Medium |
| 0163 |
Missing Ranges |
|
Medium |
| 0164 |
Maximum Gap |
|
Hard |
| 0165 |
Compare Version Numbers |
|
Medium |
| 0166 |
Fraction to Recurring Decimal |
|
Medium |
| 0167 |
Two Sum II - Input array is sorted |
|
Easy |
| 0168 |
Excel Sheet Column Title |
|
Easy |
| 0169 |
Majority Element |
|
Easy |
| 0170 |
Two Sum III - Data structure design |
|
Easy |
| 0171 |
Excel Sheet Column Number |
|
Easy |
| 0172 |
Factorial Trailing Zeroes |
|
Easy |
| 0173 |
Binary Search Tree Iterator |
|
Medium |
| 0174 |
Dungeon Game |
|
Hard |
| 0175 |
Combine Two Tables |
|
Easy |
| 0176 |
Second Highest Salary |
SQL |
Easy |
| 0177 |
Nth Highest Salary |
|
Medium |
| 0178 |
Rank Scores |
|
Medium |
| 0179 |
Largest Number |
|
Medium |
| 0180 |
Consecutive Numbers |
|
Medium |
| 0181 |
Employees Earning More Than Their Managers |
|
Easy |
| 0182 |
Duplicate Emails |
|
Easy |
| 0183 |
Customers Who Never Order |
|
Easy |
| 0184 |
Department Highest Salary |
|
Medium |
| 0185 |
Department Top Three Salaries |
|
Hard |
| 0186 |
Reverse Words in a String II |
|
Medium |
| 0187 |
Repeated DNA Sequences |
|
Medium |
| 0188 |
Best Time to Buy and Sell Stock IV |
|
Hard |
| 0189 |
Rotate Array |
|
Easy |
| 0190 |
Reverse Bits |
|
Easy |
| 0191 |
Number of 1 Bits |
|
Easy |
| 0192 |
Word Frequency |
|
Medium |
| 0193 |
Valid Phone Numbers |
|
Easy |
| 0194 |
Transpose File |
|
Medium |
| 0195 |
Tenth Line |
|
Easy |
| 0196 |
Delete Duplicate Emails |
|
Easy |
| 0197 |
Rising Temperature |
|
Easy |
| 0198 |
House Robber |
Python |
Easy |
| 0199 |
Binary Tree Right Side View |
|
Medium |
| 0200 |
Number of Islands |
|
Medium |
| 0201 |
Bitwise AND of Numbers Range |
|
Medium |
| 0202 |
Happy Number |
|
Easy |
| 0203 |
Remove Linked List Elements |
|
Easy |
| 0204 |
Count Primes |
|
Easy |
| 0205 |
Isomorphic Strings |
|
Easy |
| 0206 |
Reverse Linked List |
JavaScript, Python |
Easy |
| 0207 |
Course Schedule |
|
Medium |
| 0208 |
Implement Trie (Prefix Tree) |
|
Medium |
| 0209 |
Minimum Size Subarray Sum |
|
Medium |
| 0210 |
Course Schedule II |
|
Medium |
| 0211 |
Add and Search Word - Data structure design |
|
Medium |
| 0212 |
Word Search II |
|
Hard |
| 0213 |
House Robber II |
|
Medium |
| 0214 |
Shortest Palindrome |
|
Hard |
| 0215 |
Kth Largest Element in an Array |
JavaScript |
Medium |
| 0216 |
Combination Sum III |
|
Medium |
| 0217 |
Contains Duplicate |
|
Easy |
| 0218 |
The Skyline Problem |
|
Hard |
| 0219 |
Contains Duplicate II |
|
Easy |
| 0220 |
Contains Duplicate III |
|
Medium |
| 0221 |
Maximal Square |
|
Medium |
| 0222 |
Count Complete Tree Nodes |
|
Medium |
| 0223 |
Rectangle Area |
|
Medium |
| 0224 |
Basic Calculator |
|
Hard |
| 0225 |
Implement Stack using Queues |
|
Easy |
| 0226 |
Invert Binary Tree |
|
Easy |
| 0227 |
Basic Calculator II |
|
Medium |
| 0228 |
Summary Ranges |
|
Medium |
| 0229 |
Majority Element II |
JavaScript |
Medium |
| 0230 |
Kth Smallest Element in a BST |
JavaScript |
Medium |
| 0231 |
Power of Two |
|
Easy |
| 0232 |
Implement Queue using Stacks |
|
Easy |
| 0233 |
Number of Digit One |
|
Hard |
| 0234 |
Palindrome Linked List |
|
Easy |
| 0235 |
Lowest Common Ancestor of a Binary Search Tree |
|
Easy |
| 0236 |
Lowest Common Ancestor of a Binary Tree |
|
Medium |
| 0237 |
Delete Node in a Linked List |
|
Easy |
| 0238 |
Product of Array Except Self |
|
Medium |
| 0239 |
Sliding Window Maximum |
|
Hard |
| 0240 |
Search a 2D Matrix II |
|
Medium |
| 0241 |
Different Ways to Add Parentheses |
|
Medium |
| 0242 |
Valid Anagram |
Python |
Easy |
| 0243 |
Shortest Word Distance |
|
Easy |
| 0244 |
Shortest Word Distance II |
|
Medium |
| 0245 |
Shortest Word Distance III |
|
Medium |
| 0246 |
Strobogrammatic Number |
|
Easy |
| 0247 |
Strobogrammatic Number II |
|
Medium |
| 0248 |
Strobogrammatic Number III |
|
Hard |
| 0249 |
Group Shifted Strings |
|
Medium |
| 0250 |
Count Univalue Subtrees |
|
Medium |
| 0251 |
Flatten 2D Vector |
|
Medium |
| 0252 |
Meeting Rooms |
|
Easy |
| 0253 |
Meeting Rooms II |
|
Medium |
| 0254 |
Factor Combinations |
|
Medium |
| 0255 |
Verify Preorder Sequence in Binary Search Tree |
|
Medium |
| 0256 |
Paint House |
|
Easy |
| 0257 |
Binary Tree Paths |
|
Easy |
| 0258 |
Add Digits |
|
Easy |
| 0259 |
3Sum Smaller |
|
Medium |
| 0260 |
Single Number III |
Python |
Medium |
| 0261 |
Graph Valid Tree |
|
Medium |
| 0262 |
Trips and Users |
|
Hard |
| 0263 |
Ugly Number |
|
Easy |
| 0264 |
Ugly Number II |
|
Medium |
| 0265 |
Paint House II |
|
Hard |
| 0266 |
Palindrome Permutation |
|
Easy |
| 0267 |
Palindrome Permutation II |
|
Medium |
| 0268 |
Missing Number |
|
Easy |
| 0269 |
Alien Dictionary |
|
Hard |
| 0270 |
Closest Binary Search Tree Value |
|
Easy |
| 0271 |
Encode and Decode Strings |
|
Medium |
| 0272 |
Closest Binary Search Tree Value II |
|
Hard |
| 0273 |
Integer to English Words |
|
Hard |
| 0274 |
H-Index |
|
Medium |
| 0275 |
H-Index II |
|
Medium |
| 0276 |
Paint Fence |
|
Easy |
| 0277 |
Find the Celebrity |
|
Medium |
| 0278 |
First Bad Version |
|
Easy |
| 0279 |
Perfect Squares |
|
Medium |
| 0280 |
Wiggle Sort |
|
Medium |
| 0281 |
Zigzag Iterator |
|
Medium |
| 0282 |
Expression Add Operators |
|
Hard |
| 0283 |
Move Zeroes |
|
Easy |
| 0284 |
Peeking Iterator |
|
Medium |
| 0285 |
Inorder Successor in BST |
|
Medium |
| 0286 |
Walls and Gates |
|
Medium |
| 0287 |
Find the Duplicate Number |
JavaScript |
Medium |
| 0288 |
Unique Word Abbreviation |
|
Medium |
| 0289 |
Game of Life |
|
Medium |
| 0290 |
Word Pattern |
|
Easy |
| 0291 |
Word Pattern II |
|
Hard |
| 0292 |
Nim Game |
|
Easy |
| 0293 |
Flip Game |
|
Easy |
| 0294 |
Flip Game II |
|
Medium |
| 0295 |
Find Median from Data Stream |
|
Hard |
| 0296 |
Best Meeting Point |
|
Hard |
| 0297 |
Serialize and Deserialize Binary Tree |
|
Hard |
| 0298 |
Binary Tree Longest Consecutive Sequence |
|
Medium |
| 0299 |
Bulls and Cows |
|
Medium |
| 0300 |
Longest Increasing Subsequence |
|
Medium |
| 0301 |
Remove Invalid Parentheses |
|
Hard |
| 0302 |
Smallest Rectangle Enclosing Black Pixels |
|
Hard |
| 0303 |
Range Sum Query - Immutable |
Python |
Easy |
| 0304 |
Range Sum Query 2D - Immutable |
|
Medium |
| 0305 |
Number of Islands II |
|
Hard |
| 0306 |
Additive Number |
|
Medium |
| 0307 |
Range Sum Query - Mutable |
|
Medium |
| 0308 |
Range Sum Query 2D - Mutable |
|
Hard |
| 0309 |
Best Time to Buy and Sell Stock with Cooldown |
|
Medium |
| 0310 |
Minimum Height Trees |
|
Medium |
| 0311 |
Sparse Matrix Multiplication |
|
Medium |
| 0312 |
Burst Balloons |
|
Hard |
| 0313 |
Super Ugly Number |
|
Medium |
| 0314 |
Binary Tree Vertical Order Traversal |
|
Medium |
| 0315 |
Count of Smaller Numbers After Self |
|
Hard |
| 0316 |
Remove Duplicate Letters |
|
Hard |
| 0317 |
Shortest Distance from All Buildings |
|
Hard |
| 0318 |
Maximum Product of Word Lengths |
|
Medium |
| 0319 |
Bulb Switcher |
|
Medium |
| 0320 |
Generalized Abbreviation |
|
Medium |
| 0321 |
Create Maximum Number |
|
Hard |
| 0322 |
Coin Change |
|
Medium |
| 0323 |
Number of Connected Components in an Undirected Graph |
|
Medium |
| 0324 |
Wiggle Sort II |
|
Medium |
| 0325 |
Maximum Size Subarray Sum Equals k |
|
Medium |
| 0326 |
Power of Three |
Python |
Easy |
| 0327 |
Count of Range Sum |
|
Hard |
| 0328 |
Odd Even Linked List |
|
Medium |
| 0329 |
Longest Increasing Path in a Matrix |
|
Hard |
| 0330 |
Patching Array |
|
Hard |
| 0331 |
Verify Preorder Serialization of a Binary Tree |
|
Medium |
| 0332 |
Reconstruct Itinerary |
|
Medium |
| 0333 |
Largest BST Subtree |
|
Medium |
| 0334 |
Increasing Triplet Subsequence |
|
Medium |
| 0335 |
Self Crossing |
|
Hard |
| 0336 |
Palindrome Pairs |
|
Hard |
| 0337 |
House Robber III |
|
Medium |
| 0338 |
Counting Bits |
Python |
Medium |
| 0339 |
Nested List Weight Sum |
|
Easy |
| 0340 |
Longest Substring with At Most K Distinct Characters |
|
Hard |
| 0341 |
Flatten Nested List Iterator |
|
Medium |
| 0342 |
Power of Four |
|
Easy |
| 0343 |
Integer Break |
|
Medium |
| 0344 |
Reverse String |
|
Easy |
| 0345 |
Reverse Vowels of a String |
|
Easy |
| 0346 |
Moving Average from Data Stream |
|
Easy |
| 0347 |
Top K Frequent Elements |
Python |
Medium |
| 0348 |
Design Tic-Tac-Toe |
|
Medium |
| 0349 |
Intersection of Two Arrays |
|
Easy |
| 0350 |
Intersection of Two Arrays II |
JavaScript |
Easy |
| 0351 |
Android Unlock Patterns |
|
Medium |
| 0352 |
Data Stream as Disjoint Intervals |
|
Hard |
| 0353 |
Design Snake Game |
|
Medium |
| 0354 |
Russian Doll Envelopes |
|
Hard |
| 0355 |
Design Twitter |
|
Medium |
| 0356 |
Line Reflection |
|
Medium |
| 0357 |
Count Numbers with Unique Digits |
|
Medium |
| 0358 |
Rearrange String k Distance Apart |
|
Hard |
| 0359 |
Logger Rate Limiter |
|
Easy |
| 0360 |
Sort Transformed Array |
|
Medium |
| 0361 |
Bomb Enemy |
|
Medium |
| 0362 |
Design Hit Counter |
|
Medium |
| 0363 |
Max Sum of Rectangle No Larger Than K |
|
Hard |
| 0364 |
Nested List Weight Sum II |
|
Medium |
| 0365 |
Water and Jug Problem |
|
Medium |
| 0366 |
Find Leaves of Binary Tree |
|
Medium |
| 0367 |
Valid Perfect Square |
|
Easy |
| 0368 |
Largest Divisible Subset |
|
Medium |
| 0369 |
Plus One Linked List |
|
Medium |
| 0370 |
Range Addition |
|
Medium |
| 0371 |
Sum of Two Integers |
|
Easy |
| 0372 |
Super Pow |
|
Medium |
| 0373 |
Find K Pairs with Smallest Sums |
|
Medium |
| 0374 |
Guess Number Higher or Lower |
|
Easy |
| 0375 |
Guess Number Higher or Lower II |
|
Medium |
| 0376 |
Wiggle Subsequence |
|
Medium |
| 0377 |
Combination Sum IV |
|
Medium |
| 0378 |
Kth Smallest Element in a Sorted Matrix |
|
Medium |
| 0379 |
Design Phone Directory |
|
Medium |
| 0380 |
Insert Delete GetRandom O(1) |
|
Medium |
| 0381 |
Insert Delete GetRandom O(1) - Duplicates allowed |
|
Hard |
| 0382 |
Linked List Random Node |
|
Medium |
| 0383 |
Ransom Note |
|
Easy |
| 0384 |
Shuffle an Array |
|
Medium |
| 0385 |
Mini Parser |
|
Medium |
| 0386 |
Lexicographical Numbers |
|
Medium |
| 0387 |
First Unique Character in a String |
|
Easy |
| 0388 |
Longest Absolute File Path |
|
Medium |
| 0389 |
Find the Difference |
|
Easy |
| 0390 |
Elimination Game |
|
Medium |
| 0391 |
Perfect Rectangle |
|
Hard |
| 0392 |
Is Subsequence |
|
Medium |
| 0393 |
UTF-8 Validation |
JavaScript |
Medium |
| 0394 |
Decode String |
|
Medium |
| 0395 |
Longest Substring with At Least K Repeating Characters |
|
Medium |
| 0396 |
Rotate Function |
|
Medium |
| 0397 |
Integer Replacement |
|
Medium |
| 0398 |
Random Pick Index |
|
Medium |
| 0399 |
Evaluate Division |
|
Medium |
| 0400 |
Nth Digit |
|
Easy |
| 0401 |
Binary Watch |
|
Easy |
| 0402 |
Remove K Digits |
|
Medium |
| 0403 |
Frog Jump |
|
Hard |
| 0404 |
Sum of Left Leaves |
|
Easy |
| 0405 |
Convert a Number to Hexadecimal |
|
Easy |
| 0406 |
Queue Reconstruction by Height |
|
Medium |
| 0407 |
Trapping Rain Water II |
|
Hard |
| 0408 |
Valid Word Abbreviation |
|
Easy |
| 0409 |
Longest Palindrome |
|
Easy |
| 0410 |
Split Array Largest Sum |
|
Hard |
| 0411 |
Minimum Unique Word Abbreviation |
|
Hard |
| 0412 |
Fizz Buzz |
|
Easy |
| 0413 |
Arithmetic Slices |
|
Medium |
| 0414 |
Third Maximum Number |
Python |
Easy |
| 0415 |
Add Strings |
|
Easy |
| 0416 |
Partition Equal Subset Sum |
|
Medium |
| 0417 |
Pacific Atlantic Water Flow |
|
Medium |
| 0418 |
Sentence Screen Fitting |
|
Medium |
| 0419 |
Battleships in a Board |
|
Medium |
| 0420 |
Strong Password Checker |
|
Hard |
| 0421 |
Maximum XOR of Two Numbers in an Array |
|
Medium |
| 0422 |
Valid Word Square |
|
Easy |
| 0423 |
Reconstruct Original Digits from English |
|
Medium |
| 0424 |
Longest Repeating Character Replacement |
|
Medium |
| 0425 |
Word Squares |
|
Hard |
| 0426 |
Convert Binary Search Tree to Sorted Doubly Linked List |
|
Medium |
| 0427 |
Construct Quad Tree |
|
Medium |
| 0428 |
Serialize and Deserialize N-ary Tree |
|
Hard |
| 0429 |
N-ary Tree Level Order Traversal |
|
Easy |
| 0430 |
Flatten a Multilevel Doubly Linked List |
|
Medium |
| 0431 |
Encode N-ary Tree to Binary Tree |
|
Hard |
| 0432 |
All O`one Data Structure |
JavaScript |
Hard |
| 0433 |
Minimum Genetic Mutation |
|
Medium |
| 0434 |
Number of Segments in a String |
|
Easy |
| 0435 |
Non-overlapping Intervals |
|
Medium |
| 0436 |
Find Right Interval |
|
Medium |
| 0437 |
Path Sum III |
|
Easy |
| 0438 |
Find All Anagrams in a String |
|
Easy |
| 0439 |
Ternary Expression Parser |
|
Medium |
| 0440 |
K-th Smallest in Lexicographical Order |
|
Hard |
| 0441 |
Arranging Coins |
|
Easy |
| 0442 |
Find All Duplicates in an Array |
|
Medium |
| 0443 |
String Compression |
JavaScript |
Easy |
| 0444 |
Sequence Reconstruction |
|
Medium |
| 0445 |
Add Two Numbers II |
Python |
Medium |
| 0446 |
Arithmetic Slices II - Subsequence |
|
Hard |
| 0447 |
Number of Boomerangs |
|
Easy |
| 0448 |
Find All Numbers Disappeared in an Array |
|
Easy |
| 0449 |
Serialize and Deserialize BST |
|
Medium |
| 0450 |
Delete Node in a BST |
|
Medium |
| 0451 |
Sort Characters By Frequency |
Python |
Medium |
| 0452 |
Minimum Number of Arrows to Burst Balloons |
|
Medium |
| 0453 |
Minimum Moves to Equal Array Elements |
|
Easy |
| 0454 |
4Sum II |
|
Medium |
| 0455 |
Assign Cookies |
|
Easy |
| 0456 |
132 Pattern |
|
Medium |
| 0457 |
Circular Array Loop |
|
Medium |
| 0458 |
Poor Pigs |
|
Hard |
| 0459 |
Repeated Substring Pattern |
|
Easy |
| 0460 |
LFU Cache |
|
Hard |
| 0461 |
Hamming Distance |
|
Easy |
| 0462 |
Minimum Moves to Equal Array Elements II |
|
Medium |
| 0463 |
Island Perimeter |
Python |
Easy |
| 0464 |
Can I Win |
|
Medium |
| 0465 |
Optimal Account Balancing |
|
Hard |
| 0466 |
Count The Repetitions |
|
Hard |
| 0467 |
Unique Substrings in Wraparound String |
|
Medium |
| 0468 |
Validate IP Address |
|
Medium |
| 0469 |
Convex Polygon |
|
Medium |
| 0470 |
Implement Rand10() Using Rand7() |
|
Medium |
| 0471 |
Encode String with Shortest Length |
|
Hard |
| 0472 |
Concatenated Words |
|
Hard |
| 0473 |
Matchsticks to Square |
|
Medium |
| 0474 |
Ones and Zeroes |
|
Medium |
| 0475 |
Heaters |
|
Easy |
| 0476 |
Number Complement |
|
Easy |
| 0477 |
Total Hamming Distance |
|
Medium |
| 0478 |
Generate Random Point in a Circle |
|
Medium |
| 0479 |
Largest Palindrome Product |
|
Hard |
| 0480 |
Sliding Window Median |
|
Hard |
| 0481 |
Magical String |
|
Medium |
| 0482 |
License Key Formatting |
|
Easy |
| 0483 |
Smallest Good Base |
|
Hard |
| 0484 |
Find Permutation |
|
Medium |
| 0485 |
Max Consecutive Ones |
|
Easy |
| 0486 |
Predict the Winner |
|
Medium |
| 0487 |
Max Consecutive Ones II |
|
Medium |
| 0488 |
Zuma Game |
|
Hard |
| 0489 |
Robot Room Cleaner |
|
Hard |
| 0490 |
The Maze |
|
Medium |
| 0491 |
Increasing Subsequences |
|
Medium |
| 0492 |
Construct the Rectangle |
|
Easy |
| 0493 |
Reverse Pairs |
|
Hard |
| 0494 |
Target Sum |
|
Medium |
| 0495 |
Teemo Attacking |
|
Medium |
| 0496 |
Next Greater Element I |
|
Easy |
| 0497 |
Random Point in Non-overlapping Rectangles |
|
Medium |
| 0498 |
Diagonal Traverse |
|
Medium |
| 0499 |
The Maze III |
|
Hard |
| 0500 |
Keyboard Row |
|
Easy |
| 0501 |
Find Mode in Binary Search Tree |
|
Easy |
| 0502 |
IPO |
|
Hard |
| 0503 |
Next Greater Element II |
|
Medium |
| 0504 |
Base 7 |
|
Easy |
| 0505 |
The Maze II |
|
Medium |
| 0506 |
Relative Ranks |
|
Easy |
| 0507 |
Perfect Number |
|
Easy |
| 0508 |
Most Frequent Subtree Sum |
|
Medium |
| 0509 |
Fibonacci Number |
|
Easy |
| 0510 |
Inorder Successor in BST II |
|
Medium |
| 0511 |
Game Play Analysis I |
|
Easy |
| 0512 |
Game Play Analysis II |
|
Easy |
| 0513 |
Find Bottom Left Tree Value |
|
Medium |
| 0514 |
Freedom Trail |
|
Hard |
| 0515 |
Find Largest Value in Each Tree Row |
|
Medium |
| 0516 |
Longest Palindromic Subsequence |
|
Medium |
| 0517 |
Super Washing Machines |
|
Hard |
| 0518 |
Coin Change 2 |
|
Medium |
| 0519 |
Random Flip Matrix |
|
Medium |
| 0520 |
Detect Capital |
|
Easy |
| 0521 |
Longest Uncommon Subsequence I |
|
Easy |
| 0522 |
Longest Uncommon Subsequence II |
|
Medium |
| 0523 |
Continuous Subarray Sum |
|
Medium |
| 0524 |
Longest Word in Dictionary through Deleting |
Python |
Medium |
| 0525 |
Contiguous Array |
|
Medium |
| 0526 |
Beautiful Arrangement |
|
Medium |
| 0527 |
Word Abbreviation |
|
Hard |
| 0528 |
Random Pick with Weight |
|
Medium |
| 0529 |
Minesweeper |
|
Medium |
| 0530 |
Minimum Absolute Difference in BST |
|
Easy |
| 0531 |
Lonely Pixel I |
|
Medium |
| 0532 |
K-diff Pairs in an Array |
|
Easy |
| 0533 |
Lonely Pixel II |
|
Medium |
| 0534 |
Game Play Analysis III |
|
Medium |
| 0535 |
Encode and Decode TinyURL |
|
Medium |
| 0536 |
Construct Binary Tree from String |
|
Medium |
| 0537 |
Complex Number Multiplication |
|
Medium |
| 0538 |
Convert BST to Greater Tree |
|
Easy |
| 0539 |
Minimum Time Difference |
|
Medium |
| 0540 |
Single Element in a Sorted Array |
|
Medium |
| 0541 |
Reverse String II |
|
Easy |
| 0542 |
01 Matrix |
|
Medium |
| 0543 |
Diameter of Binary Tree |
|
Easy |
| 0544 |
Output Contest Matches |
|
Medium |
| 0545 |
Boundary of Binary Tree |
|
Medium |
| 0546 |
Remove Boxes |
|
Hard |
| 0547 |
Friend Circles |
JavaScript |
Medium |
| 0548 |
Split Array with Equal Sum |
|
Medium |
| 0549 |
Binary Tree Longest Consecutive Sequence II |
|
Medium |
| 0550 |
Game Play Analysis IV |
|
Medium |
| 0551 |
Student Attendance Record I |
JavaScript |
Easy |
| 0552 |
Student Attendance Record II |
|
Hard |
| 0553 |
Optimal Division |
|
Medium |
| 0554 |
Brick Wall |
|
Medium |
| 0555 |
Split Concatenated Strings |
|
Medium |
| 0556 |
Next Greater Element III |
|
Medium |
| 0557 |
Reverse Words in a String III |
|
Easy |
| 0558 |
Quad Tree Intersection |
|
Easy |
| 0559 |
Maximum Depth of N-ary Tree |
|
Easy |
| 0560 |
Subarray Sum Equals K |
|
Medium |
| 0561 |
Array Partition I |
|
Easy |
| 0562 |
Longest Line of Consecutive One in Matrix |
|
Medium |
| 0563 |
Binary Tree Tilt |
|
Easy |
| 0564 |
Find the Closest Palindrome |
|
Hard |
| 0565 |
Array Nesting |
JavaScript |
Medium |
| 0566 |
Reshape the Matrix |
|
Easy |
| 0567 |
Permutation in String |
|
Medium |
| 0568 |
Maximum Vacation Days |
|
Hard |
| 0569 |
Median Employee Salary |
|
Hard |
| 0570 |
Managers with at Least 5 Direct Reports |
|
Medium |
| 0571 |
Find Median Given Frequency of Numbers |
|
Hard |
| 0572 |
Subtree of Another Tree |
|
Easy |
| 0573 |
Squirrel Simulation |
|
Medium |
| 0574 |
Winning Candidate |
|
Medium |
| 0575 |
Distribute Candies |
|
Easy |
| 0576 |
Out of Boundary Paths |
|
Medium |
| 0577 |
Employee Bonus |
|
Easy |
| 0578 |
Get Highest Answer Rate Question |
|
Medium |
| 0579 |
Find Cumulative Salary of an Employee |
|
Hard |
| 0580 |
Count Student Number in Departments |
|
Medium |
| 0581 |
Shortest Unsorted Continuous Subarray |
|
Easy |
| 0582 |
Kill Process |
|
Medium |
| 0583 |
Delete Operation for Two Strings |
|
Medium |
| 0584 |
Find Customer Referee |
|
Easy |
| 0585 |
Investments in 2016 |
|
Medium |
| 0586 |
Customer Placing the Largest Number of Orders |
|
Easy |
| 0587 |
Erect the Fence |
|
Hard |
| 0588 |
Design In-Memory File System |
|
Hard |
| 0589 |
N-ary Tree Preorder Traversal |
|
Easy |
| 0590 |
N-ary Tree Postorder Traversal |
|
Easy |
| 0591 |
Tag Validator |
|
Hard |
| 0592 |
Fraction Addition and Subtraction |
|
Medium |
| 0593 |
Valid Square |
|
Medium |
| 0594 |
Longest Harmonious Subsequence |
|
Easy |
| 0595 |
Big Countries |
SQL |
Easy |
| 0596 |
Classes More Than 5 Students |
|
Easy |
| 0597 |
Friend Requests I: Overall Acceptance Rate |
|
Easy |
| 0598 |
Range Addition II |
|
Easy |
| 0599 |
Minimum Index Sum of Two Lists |
|
Easy |
| 0600 |
Non-negative Integers without Consecutive Ones |
|
Hard |
| 0601 |
Human Traffic of Stadium |
|
Hard |
| 0602 |
Friend Requests II: Who Has the Most Friends |
|
Medium |
| 0603 |
Consecutive Available Seats |
|
Easy |
| 0604 |
Design Compressed String Iterator |
|
Easy |
| 0605 |
Can Place Flowers |
|
Easy |
| 0606 |
Construct String from Binary Tree |
|
Easy |
| 0607 |
Sales Person |
|
Easy |
| 0608 |
Tree Node |
|
Medium |
| 0609 |
Find Duplicate File in System |
|
Medium |
| 0610 |
Triangle Judgement |
|
Easy |
| 0611 |
Valid Triangle Number |
|
Medium |
| 0612 |
Shortest Distance in a Plane |
|
Medium |
| 0613 |
Shortest Distance in a Line |
|
Easy |
| 0614 |
Second Degree Follower |
|
Medium |
| 0615 |
Average Salary: Departments VS Company |
|
Hard |
| 0616 |
Add Bold Tag in String |
|
Medium |
| 0617 |
Merge Two Binary Trees |
|
Easy |
| 0618 |
Students Report By Geography |
|
Hard |
| 0619 |
Biggest Single Number |
|
Easy |
| 0620 |
Not Boring Movies |
|
Easy |
| 0621 |
Task Scheduler |
|
Medium |
| 0622 |
Design Circular Queue |
|
Medium |
| 0623 |
Add One Row to Tree |
|
Medium |
| 0624 |
Maximum Distance in Arrays |
|
Easy |
| 0625 |
Minimum Factorization |
|
Medium |
| 0626 |
Exchange Seats |
|
Medium |
| 0627 |
Swap Salary |
|
Easy |
| 0628 |
Maximum Product of Three Numbers |
|
Easy |
| 0629 |
K Inverse Pairs Array |
|
Hard |
| 0630 |
Course Schedule III |
|
Hard |
| 0631 |
Design Excel Sum Formula |
|
Hard |
| 0632 |
Smallest Range |
|
Hard |
| 0633 |
Sum of Square Numbers |
|
Easy |
| 0634 |
Find the Derangement of An Array |
|
Medium |
| 0635 |
Design Log Storage System |
|
Medium |
| 0636 |
Exclusive Time of Functions |
|
Medium |
| 0637 |
Average of Levels in Binary Tree |
|
Easy |
| 0638 |
Shopping Offers |
|
Medium |
| 0639 |
Decode Ways II |
|
Hard |
| 0640 |
Solve the Equation |
|
Medium |
| 0641 |
Design Circular Deque |
|
Medium |
| 0642 |
Design Search Autocomplete System |
|
Hard |
| 0643 |
Maximum Average Subarray I |
|
Easy |
| 0644 |
Maximum Average Subarray II |
|
Hard |
| 0645 |
Set Mismatch |
|
Easy |
| 0646 |
Maximum Length of Pair Chain |
|
Medium |
| 0647 |
Palindromic Substrings |
|
Medium |
| 0648 |
Replace Words |
|
Medium |
| 0649 |
Dota2 Senate |
|
Medium |
| 0650 |
2 Keys Keyboard |
|
Medium |
| 0651 |
4 Keys Keyboard |
|
Medium |
| 0652 |
Find Duplicate Subtrees |
|
Medium |
| 0653 |
Two Sum IV - Input is a BST |
|
Easy |
| 0654 |
Maximum Binary Tree |
|
Medium |
| 0655 |
Print Binary Tree |
|
Medium |
| 0656 |
Coin Path |
|
Hard |
| 0657 |
Robot Return to Origin |
|
Easy |
| 0658 |
Find K Closest Elements |
|
Medium |
| 0659 |
Split Array into Consecutive Subsequences |
|
Medium |
| 0660 |
Remove 9 |
|
Hard |
| 0661 |
Image Smoother |
|
Easy |
| 0662 |
Maximum Width of Binary Tree |
|
Medium |
| 0663 |
Equal Tree Partition |
|
Medium |
| 0664 |
Strange Printer |
|
Hard |
| 0665 |
Non-decreasing Array |
|
Easy |
| 0666 |
Path Sum IV |
|
Medium |
| 0667 |
Beautiful Arrangement II |
|
Medium |
| 0668 |
Kth Smallest Number in Multiplication Table |
|
Hard |
| 0669 |
Trim a Binary Search Tree |
|
Easy |
| 0670 |
Maximum Swap |
JavaScript |
Medium |
| 0671 |
Second Minimum Node In a Binary Tree |
|
Easy |
| 0672 |
Bulb Switcher II |
|
Medium |
| 0673 |
Number of Longest Increasing Subsequence |
|
Medium |
| 0674 |
Longest Continuous Increasing Subsequence |
|
Easy |
| 0675 |
Cut Off Trees for Golf Event |
|
Hard |
| 0676 |
Implement Magic Dictionary |
|
Medium |
| 0677 |
Map Sum Pairs |
|
Medium |
| 0678 |
Valid Parenthesis String |
|
Medium |
| 0679 |
24 Game |
|
Hard |
| 0680 |
Valid Palindrome II |
|
Easy |
| 0681 |
Next Closest Time |
|
Medium |
| 0682 |
Baseball Game |
|
Easy |
| 0683 |
K Empty Slots |
|
Hard |
| 0684 |
Redundant Connection |
|
Medium |
| 0685 |
Redundant Connection II |
|
Hard |
| 0686 |
Repeated String Match |
JavaScript |
Easy |
| 0687 |
Longest Univalue Path |
|
Easy |
| 0688 |
Knight Probability in Chessboard |
|
Medium |
| 0689 |
Maximum Sum of 3 Non-Overlapping Subarrays |
|
Hard |
| 0690 |
Employee Importance |
|
Easy |
| 0691 |
Stickers to Spell Word |
|
Hard |
| 0692 |
Top K Frequent Words |
|
Medium |
| 0693 |
Binary Number with Alternating Bits |
|
Easy |
| 0694 |
Number of Distinct Islands |
|
Medium |
| 0695 |
Max Area of Island |
JavaScript |
Medium |
| 0696 |
Count Binary Substrings |
|
Easy |
| 0697 |
Degree of an Array |
|
Easy |
| 0698 |
Partition to K Equal Sum Subsets |
|
Medium |
| 0699 |
Falling Squares |
|
Hard |
| 0700 |
Search in a Binary Search Tree |
|
Easy |
| 0701 |
Insert into a Binary Search Tree |
|
Medium |
| 0702 |
Search in a Sorted Array of Unknown Size |
|
Medium |
| 0703 |
Kth Largest Element in a Stream |
|
Easy |
| 0704 |
Binary Search |
|
Easy |
| 0705 |
Design HashSet |
|
Easy |
| 0706 |
Design HashMap |
|
Easy |
| 0707 |
Design Linked List |
|
Easy |
| 0708 |
Insert into a Cyclic Sorted List |
|
Medium |
| 0709 |
To Lower Case |
JavaScript, Python |
Easy |
| 0710 |
Random Pick with Blacklist |
|
Hard |
| 0711 |
Number of Distinct Islands II |
|
Hard |
| 0712 |
Minimum ASCII Delete Sum for Two Strings |
|
Medium |
| 0713 |
Subarray Product Less Than K |
|
Medium |
| 0714 |
Best Time to Buy and Sell Stock with Transaction Fee |
|
Medium |
| 0715 |
Range Module |
|
Hard |
| 0716 |
Max Stack |
|
Easy |
| 0717 |
1-bit and 2-bit Characters |
|
Easy |
| 0718 |
Maximum Length of Repeated Subarray |
|
Medium |
| 0719 |
Find K-th Smallest Pair Distance |
|
Hard |
| 0720 |
Longest Word in Dictionary |
|
Easy |
| 0721 |
Accounts Merge |
|
Medium |
| 0722 |
Remove Comments |
|
Medium |
| 0723 |
Candy Crush |
|
Medium |
| 0724 |
Find Pivot Index |
|
Easy |
| 0725 |
Split Linked List in Parts |
|
Medium |
| 0726 |
Number of Atoms |
Python |
Hard |
| 0727 |
Minimum Window Subsequence |
|
Hard |
| 0728 |
Self Dividing Numbers |
|
Easy |
| 0729 |
My Calendar I |
|
Medium |
| 0730 |
Count Different Palindromic Subsequences |
|
Hard |
| 0731 |
My Calendar II |
|
Medium |
| 0732 |
My Calendar III |
|
Hard |
| 0733 |
Flood Fill |
|
Easy |
| 0734 |
Sentence Similarity |
|
Easy |
| 0735 |
Asteroid Collision |
|
Medium |
| 0736 |
Parse Lisp Expression |
|
Hard |
| 0737 |
Sentence Similarity II |
|
Medium |
| 0738 |
Monotone Increasing Digits |
|
Medium |
| 0739 |
Daily Temperatures |
|
Medium |
| 0740 |
Delete and Earn |
|
Medium |
| 0741 |
Cherry Pickup |
|
Hard |
| 0742 |
Closest Leaf in a Binary Tree |
|
Medium |
| 0743 |
Network Delay Time |
|
Medium |
| 0744 |
Find Smallest Letter Greater Than Target |
|
Easy |
| 0745 |
Prefix and Suffix Search |
|
Hard |
| 0746 |
Min Cost Climbing Stairs |
Python |
Easy |
| 0747 |
Largest Number At Least Twice of Others |
|
Easy |
| 0748 |
Shortest Completing Word |
|
Easy |
| 0749 |
Contain Virus |
|
Hard |
| 0750 |
Number Of Corner Rectangles |
|
Medium |
| 0751 |
IP to CIDR |
|
Easy |
| 0752 |
Open the Lock |
|
Medium |
| 0753 |
Cracking the Safe |
|
Hard |
| 0754 |
Reach a Number |
|
Easy |
| 0755 |
Pour Water |
|
Medium |
| 0756 |
Pyramid Transition Matrix |
|
Medium |
| 0757 |
Set Intersection Size At Least Two |
|
Hard |
| 0758 |
Bold Words in String |
|
Easy |
| 0759 |
Employee Free Time |
|
Hard |
| 0760 |
Find Anagram Mappings |
|
Easy |
| 0761 |
Special Binary String |
|
Hard |
| 0762 |
Prime Number of Set Bits in Binary Representation |
|
Easy |
| 0763 |
Partition Labels |
|
Medium |
| 0764 |
Largest Plus Sign |
|
Medium |
| 0765 |
Couples Holding Hands |
|
Hard |
| 0766 |
Toeplitz Matrix |
|
Easy |
| 0767 |
Reorganize String |
|
Medium |
| 0768 |
Max Chunks To Make Sorted II |
|
Hard |
| 0769 |
Max Chunks To Make Sorted |
|
Medium |
| 0770 |
Basic Calculator IV |
|
Hard |
| 0771 |
Jewels and Stones |
JavaScript, Python |
Easy |
| 0772 |
Basic Calculator III |
|
Hard |
| 0773 |
Sliding Puzzle |
|
Hard |
| 0774 |
Minimize Max Distance to Gas Station |
|
Hard |
| 0775 |
Global and Local Inversions |
|
Medium |
| 0776 |
Split BST |
|
Medium |
| 0777 |
Swap Adjacent in LR String |
|
Medium |
| 0778 |
Swim in Rising Water |
|
Hard |
| 0779 |
K-th Symbol in Grammar |
|
Medium |
| 0780 |
Reaching Points |
|
Hard |
| 0781 |
Rabbits in Forest |
|
Medium |
| 0782 |
Transform to Chessboard |
|
Hard |
| 0783 |
Minimum Distance Between BST Nodes |
|
Easy |
| 0784 |
Letter Case Permutation |
|
Easy |
| 0785 |
Is Graph Bipartite? |
|
Medium |
| 0786 |
K-th Smallest Prime Fraction |
|
Hard |
| 0787 |
Cheapest Flights Within K Stops |
|
Medium |
| 0788 |
Rotated Digits |
|
Easy |
| 0789 |
Escape The Ghosts |
|
Medium |
| 0790 |
Domino and Tromino Tiling |
|
Medium |
| 0791 |
Custom Sort String |
|
Medium |
| 0792 |
Number of Matching Subsequences |
|
Medium |
| 0793 |
Preimage Size of Factorial Zeroes Function |
|
Hard |
| 0794 |
Valid Tic-Tac-Toe State |
|
Medium |
| 0795 |
Number of Subarrays with Bounded Maximum |
|
Medium |
| 0796 |
Rotate String |
|
Easy |
| 0797 |
All Paths From Source to Target |
|
Medium |
| 0798 |
Smallest Rotation with Highest Score |
|
Hard |
| 0799 |
Champagne Tower |
|
Medium |
| 0800 |
Similar RGB Color |
|
Easy |
| 0801 |
Minimum Swaps To Make Sequences Increasing |
|
Medium |
| 0802 |
Find Eventual Safe States |
|
Medium |
| 0803 |
Bricks Falling When Hit |
|
Hard |
| 0804 |
Unique Morse Code Words |
|
Easy |
| 0805 |
Split Array With Same Average |
|
Hard |
| 0806 |
Number of Lines To Write String |
|
Easy |
| 0807 |
Max Increase to Keep City Skyline |
|
Medium |
| 0808 |
Soup Servings |
|
Medium |
| 0809 |
Expressive Words |
|
Medium |
| 0810 |
Chalkboard XOR Game |
|
Hard |
| 0811 |
Subdomain Visit Count |
|
Easy |
| 0812 |
Largest Triangle Area |
|
Easy |
| 0813 |
Largest Sum of Averages |
|
Medium |
| 0814 |
Binary Tree Pruning |
|
Medium |
| 0815 |
Bus Routes |
|
Hard |
| 0816 |
Ambiguous Coordinates |
|
Medium |
| 0817 |
Linked List Components |
|
Medium |
| 0818 |
Race Car |
|
Hard |
| 0819 |
Most Common Word |
|
Easy |
| 0820 |
Short Encoding of Words |
|
Medium |
| 0821 |
Shortest Distance to a Character |
|
Easy |
| 0822 |
Card Flipping Game |
|
Medium |
| 0823 |
Binary Trees With Factors |
|
Medium |
| 0824 |
Goat Latin |
|
Easy |
| 0825 |
Friends Of Appropriate Ages |
|
Medium |
| 0826 |
Most Profit Assigning Work |
|
Medium |
| 0827 |
Making A Large Island |
|
Hard |
| 0828 |
Unique Letter String |
|
Hard |
| 0829 |
Consecutive Numbers Sum |
|
Hard |
| 0830 |
Positions of Large Groups |
|
Easy |
| 0831 |
Masking Personal Information |
|
Medium |
| 0832 |
Flipping an Image |
JavaScript |
Easy |
| 0833 |
Find And Replace in String |
|
Medium |
| 0834 |
Sum of Distances in Tree |
|
Hard |
| 0835 |
Image Overlap |
|
Medium |
| 0836 |
Rectangle Overlap |
|
Easy |
| 0837 |
New 21 Game |
|
Medium |
| 0838 |
Push Dominoes |
|
Medium |
| 0839 |
Similar String Groups |
|
Hard |
| 0840 |
Magic Squares In Grid |
|
Easy |
| 0841 |
Keys and Rooms |
|
Medium |
| 0842 |
Split Array into Fibonacci Sequence |
|
Medium |
| 0843 |
Guess the Word |
|
Hard |
| 0844 |
Backspace String Compare |
|
Easy |
| 0845 |
Longest Mountain in Array |
|
Medium |
| 0846 |
Hand of Straights |
|
Medium |
| 0847 |
Shortest Path Visiting All Nodes |
|
Hard |
| 0848 |
Shifting Letters |
|
Medium |
| 0849 |
Maximize Distance to Closest Person |
|
Easy |
| 0850 |
Rectangle Area II |
|
Hard |
| 0851 |
Loud and Rich |
|
Medium |
| 0852 |
Peak Index in a Mountain Array |
|
Easy |
| 0853 |
Car Fleet |
|
Medium |
| 0854 |
K-Similar Strings |
|
Hard |
| 0855 |
Exam Room |
|
Medium |
| 0856 |
Score of Parentheses |
|
Medium |
| 0857 |
Minimum Cost to Hire K Workers |
|
Hard |
| 0858 |
Mirror Reflection |
|
Medium |
| 0859 |
Buddy Strings |
|
Easy |
| 0860 |
Lemonade Change |
|
Easy |
| 0861 |
Score After Flipping Matrix |
|
Medium |
| 0862 |
Shortest Subarray with Sum at Least K |
|
Hard |
| 0863 |
All Nodes Distance K in Binary Tree |
|
Medium |
| 0864 |
Shortest Path to Get All Keys |
|
Hard |
| 0865 |
Smallest Subtree with all the Deepest Nodes |
|
Medium |
| 0866 |
Prime Palindrome |
|
Medium |
| 0867 |
Transpose Matrix |
|
Easy |
| 0868 |
Binary Gap |
|
Easy |
| 0869 |
Reordered Power of 2 |
|
Medium |
| 0870 |
Advantage Shuffle |
|
Medium |
| 0871 |
Minimum Number of Refueling Stops |
|
Hard |
| 0872 |
Leaf-Similar Trees |
|
Easy |
| 0873 |
Length of Longest Fibonacci Subsequence |
|
Medium |
| 0874 |
Walking Robot Simulation |
|
Easy |
| 0875 |
Koko Eating Bananas |
|
Medium |
| 0876 |
Middle of the Linked List |
Python |
Easy |
| 0877 |
Stone Game |
Python |
Medium |
| 0878 |
Nth Magical Number |
|
Hard |
| 0879 |
Profitable Schemes |
|
Hard |
| 0880 |
Decoded String at Index |
|
Medium |
| 0881 |
Boats to Save People |
|
Medium |
| 0882 |
Reachable Nodes In Subdivided Graph |
|
Hard |
| 0883 |
Projection Area of 3D Shapes |
|
Easy |
| 0884 |
Uncommon Words from Two Sentences |
|
Easy |
| 0885 |
Spiral Matrix III |
|
Medium |
| 0886 |
Possible Bipartition |
|
Medium |
| 0887 |
Super Egg Drop |
|
Hard |
| 0888 |
Fair Candy Swap |
|
Easy |
| 0889 |
Construct Binary Tree from Preorder and Postorder Traversal |
|
Medium |
| 0890 |
Find and Replace Pattern |
|
Medium |
| 0891 |
Sum of Subsequence Widths |
|
Hard |
| 0892 |
Surface Area of 3D Shapes |
|
Easy |
| 0893 |
Groups of Special-Equivalent Strings |
|
Easy |
| 0894 |
All Possible Full Binary Trees |
|
Medium |
| 0895 |
Maximum Frequency Stack |
|
Hard |
| 0896 |
Monotonic Array |
|
Easy |
| 0897 |
Increasing Order Search Tree |
|
Easy |
| 0898 |
Bitwise ORs of Subarrays |
|
Medium |
| 0899 |
Orderly Queue |
|
Hard |
| 0900 |
RLE Iterator |
|
Medium |
| 0901 |
Online Stock Span |
|
Medium |
| 0902 |
Numbers At Most N Given Digit Set |
|
Hard |
| 0903 |
Valid Permutations for DI Sequence |
|
Hard |
| 0904 |
Fruit Into Baskets |
|
Medium |
| 0905 |
Sort Array By Parity |
JavaScript |
Easy |
| 0906 |
Super Palindromes |
|
Hard |
| 0907 |
Sum of Subarray Minimums |
|
Medium |
| 0908 |
Smallest Range I |
|
Easy |
| 0909 |
Snakes and Ladders |
|
Medium |
| 0910 |
Smallest Range II |
|
Medium |
| 0911 |
Online Election |
|
Medium |
| 0912 |
Sort an Array |
|
Medium |
| 0913 |
Cat and Mouse |
|
Hard |
| 0914 |
X of a Kind in a Deck of Cards |
Python |
Easy |
| 0915 |
Partition Array into Disjoint Intervals |
|
Medium |
| 0916 |
Word Subsets |
|
Medium |
| 0917 |
Reverse Only Letters |
|
Easy |
| 0918 |
Maximum Sum Circular Subarray |
|
Medium |
| 0919 |
Complete Binary Tree Inserter |
|
Medium |
| 0920 |
Number of Music Playlists |
|
Hard |
| 0921 |
Minimum Add to Make Parentheses Valid |
|
Medium |
| 0922 |
Sort Array By Parity II |
|
Easy |
| 0923 |
3Sum With Multiplicity |
|
Medium |
| 0924 |
Minimize Malware Spread |
|
Hard |
| 0925 |
Long Pressed Name |
|
Easy |
| 0926 |
Flip String to Monotone Increasing |
|
Medium |
| 0927 |
Three Equal Parts |
|
Hard |
| 0928 |
Minimize Malware Spread II |
|
Hard |
| 0929 |
Unique Email Addresses |
JavaScript |
Easy |
| 0930 |
Binary Subarrays With Sum |
|
Medium |
| 0931 |
Minimum Falling Path Sum |
|
Medium |
| 0932 |
Beautiful Array |
|
Medium |
| 0933 |
Number of Recent Calls |
|
Easy |
| 0934 |
Shortest Bridge |
|
Medium |
| 0935 |
Knight Dialer |
|
Medium |
| 0936 |
Stamping The Sequence |
|
Hard |
| 0937 |
Reorder Log Files |
|
Easy |
| 0938 |
Range Sum of BST |
|
Easy |
| 0939 |
Minimum Area Rectangle |
|
Medium |
| 0940 |
Distinct Subsequences II |
|
Hard |
| 0941 |
Valid Mountain Array |
|
Easy |
| 0942 |
DI String Match |
|
Easy |
| 0943 |
Find the Shortest Superstring |
|
Hard |
| 0944 |
Delete Columns to Make Sorted |
|
Easy |
| 0945 |
Minimum Increment to Make Array Unique |
|
Medium |
| 0946 |
Validate Stack Sequences |
|
Medium |
| 0947 |
Most Stones Removed with Same Row or Column |
|
Medium |
| 0948 |
Bag of Tokens |
|
Medium |
| 0949 |
Largest Time for Given Digits |
|
Easy |
| 0950 |
Reveal Cards In Increasing Order |
|
Medium |
| 0951 |
Flip Equivalent Binary Trees |
|
Medium |
| 0952 |
Largest Component Size by Common Factor |
|
Hard |
| 0953 |
Verifying an Alien Dictionary |
|
Easy |
| 0954 |
Array of Doubled Pairs |
|
Medium |
| 0955 |
Delete Columns to Make Sorted II |
|
Medium |
| 0956 |
Tallest Billboard |
|
Hard |
| 0957 |
Prison Cells After N Days |
|
Medium |
| 0958 |
Check Completeness of a Binary Tree |
|
Medium |
| 0959 |
Regions Cut By Slashes |
|
Medium |
| 0960 |
Delete Columns to Make Sorted III |
|
Hard |
| 0961 |
N-Repeated Element in Size 2N Array |
Go, JavaScript |
Easy |
| 0962 |
Maximum Width Ramp |
|
Medium |
| 0963 |
Minimum Area Rectangle II |
|
Medium |
| 0964 |
Least Operators to Express Number |
|
Hard |
| 0965 |
Univalued Binary Tree |
|
Easy |
| 0966 |
Vowel Spellchecker |
|
Medium |
| 0967 |
Numbers With Same Consecutive Differences |
|
Medium |
| 0968 |
Binary Tree Cameras |
|
Hard |
| 0969 |
Pancake Sorting |
|
Medium |
| 0970 |
Powerful Integers |
|
Easy |
| 0971 |
Flip Binary Tree To Match Preorder Traversal |
|
Medium |
| 0972 |
Equal Rational Numbers |
|
Hard |
| 0973 |
K Closest Points to Origin |
|
Medium |
| 0974 |
Subarray Sums Divisible by K |
|
Medium |
| 0975 |
Odd Even Jump |
|
Hard |
| 0976 |
Largest Perimeter Triangle |
|
Easy |
| 0977 |
Squares of a Sorted Array |
|
Easy |
| 0978 |
Longest Turbulent Subarray |
|
Medium |
| 0979 |
Distribute Coins in Binary Tree |
|
Medium |
| 0980 |
Unique Paths III |
|
Hard |
| 0981 |
Time Based Key-Value Store |
|
Medium |
| 0982 |
Triples with Bitwise AND Equal To Zero |
|
Hard |
| 0983 |
Minimum Cost For Tickets |
|
Medium |
| 0984 |
String Without AAA or BBB |
|
Medium |
| 0985 |
Sum of Even Numbers After Queries |
|
Easy |
| 0986 |
Interval List Intersections |
|
Medium |
| 0987 |
Vertical Order Traversal of a Binary Tree |
|
Medium |
| 0988 |
Smallest String Starting From Leaf |
|
Medium |
| 0989 |
Add to Array-Form of Integer |
|
Easy |
| 0990 |
Satisfiability of Equality Equations |
|
Medium |
| 0991 |
Broken Calculator |
|
Medium |
| 0992 |
Subarrays with K Different Integers |
|
Hard |
| 0993 |
Cousins in Binary Tree |
|
Easy |
| 0994 |
Rotting Oranges |
|
Easy |
| 0995 |
Minimum Number of K Consecutive Bit Flips |
|
Hard |
| 0996 |
Number of Squareful Arrays |
|
Hard |
| 0997 |
Find the Town Judge |
|
Easy |
| 0998 |
Maximum Binary Tree II |
|
Medium |
| 0999 |
Available Captures for Rook |
|
Easy |
| 1000 |
Minimum Cost to Merge Stones |
|
Hard |
| 1001 |
Grid Illumination |
|
Hard |
| 1002 |
Find Common Characters |
|
Easy |
| 1003 |
Check If Word Is Valid After Substitutions |
|
Medium |
| 1004 |
Max Consecutive Ones III |
|
Medium |
| 1005 |
Maximize Sum Of Array After K Negations |
|
Easy |
| 1006 |
Clumsy Factorial |
|
Medium |
| 1007 |
Minimum Domino Rotations For Equal Row |
|
Medium |
| 1008 |
Construct Binary Search Tree from Preorder Traversal |
|
Medium |
| 1009 |
Complement of Base 10 Integer |
|
Easy |
| 1010 |
Pairs of Songs With Total Durations Divisible by 60 |
|
Easy |
| 1011 |
Capacity To Ship Packages Within D Days |
|
Medium |
| 1012 |
Numbers With Repeated Digits |
|
Hard |
| 1013 |
Partition Array Into Three Parts With Equal Sum |
|
Easy |
| 1014 |
Best Sightseeing Pair |
|
Medium |
| 1015 |
Smallest Integer Divisible by K |
|
Medium |
| 1016 |
Binary String With Substrings Representing 1 To N |
|
Medium |
| 1017 |
Convert to Base -2 |
|
Medium |
| 1018 |
Binary Prefix Divisible By 5 |
|
Easy |
| 1019 |
Next Greater Node In Linked List |
|
Medium |
| 1020 |
Number of Enclaves |
|
Medium |
| 1021 |
Remove Outermost Parentheses |
|
Easy |
| 1022 |
Sum of Root To Leaf Binary Numbers |
|
Easy |
| 1023 |
Camelcase Matching |
|
Medium |
| 1024 |
Video Stitching |
|
Medium |
| 1025 |
Divisor Game |
|
Easy |
| 1026 |
Maximum Difference Between Node and Ancestor |
|
Medium |
| 1027 |
Longest Arithmetic Sequence |
|
Medium |
| 1028 |
Recover a Tree From Preorder Traversal |
|
Hard |
| 1029 |
Two City Scheduling |
|
Easy |
| 1030 |
Matrix Cells in Distance Order |
|
Easy |
| 1031 |
Maximum Sum of Two Non-Overlapping Subarrays |
|
Medium |
| 1032 |
Stream of Characters |
|
Hard |
| 1033 |
Moving Stones Until Consecutive |
|
Easy |
| 1034 |
Coloring A Border |
|
Medium |
| 1035 |
Uncrossed Lines |
|
Medium |
| 1036 |
Escape a Large Maze |
|
Hard |
| 1037 |
Valid Boomerang |
|
Easy |
| 1038 |
Binary Search Tree to Greater Sum Tree |
|
Medium |
| 1039 |
Minimum Score Triangulation of Polygon |
|
Medium |
| 1040 |
Moving Stones Until Consecutive II |
|
Medium |
| 1041 |
Robot Bounded In Circle |
|
Easy |
| 1042 |
Flower Planting With No Adjacent |
|
Easy |
| 1043 |
Partition Array for Maximum Sum |
|
Medium |
| 1044 |
Longest Duplicate Substring |
|
Hard |
| 1045 |
Customers Who Bought All Products |
|
Medium |
| 1046 |
Last Stone Weight |
|
Easy |
| 1047 |
Remove All Adjacent Duplicates In String |
|
Easy |
| 1048 |
Longest String Chain |
|
Medium |
| 1049 |
Last Stone Weight II |
|
Medium |
| 1050 |
Actors and Directors Who Cooperated At Least Three Times |
|
Easy |
| 1051 |
Height Checker |
|
Easy |
| 1052 |
Grumpy Bookstore Owner |
|
Medium |
| 1053 |
Previous Permutation With One Swap |
|
Medium |
| 1054 |
Distant Barcodes |
|
Medium |
| 1055 |
Shortest Way to Form String |
|
Medium |
| 1056 |
Confusing Number |
|
Easy |
| 1057 |
Campus Bikes |
|
Medium |
| 1058 |
Minimize Rounding Error to Meet Target |
|
Medium |
| 1059 |
All Paths from Source Lead to Destination |
|
Medium |
| 1060 |
Missing Element in Sorted Array |
|
Medium |
| 1061 |
Lexicographically Smallest Equivalent String |
|
Medium |
| 1062 |
Longest Repeating Substring |
|
Medium |
| 1063 |
Number of Valid Subarrays |
|
Hard |
| 1064 |
Fixed Point |
|
Easy |
| 1065 |
Index Pairs of a String |
|
Easy |
| 1066 |
Campus Bikes II |
|
Medium |
| 1067 |
Digit Count in Range |
|
Hard |
| 1068 |
Product Sales Analysis I |
|
Easy |
| 1069 |
Product Sales Analysis II |
|
Easy |
| 1070 |
Product Sales Analysis III |
|
Medium |
| 1071 |
Greatest Common Divisor of Strings |
|
Easy |
| 1072 |
Flip Columns For Maximum Number of Equal Rows |
|
Medium |
| 1073 |
Adding Two Negabinary Numbers |
|
Medium |
| 1074 |
Number of Submatrices That Sum to Target |
|
Hard |
| 1075 |
Project Employees I |
|
Easy |
| 1076 |
Project Employees II |
|
Easy |
| 1077 |
Project Employees III |
|
Medium |
| 1078 |
Occurrences After Bigram |
|
Easy |
| 1079 |
Letter Tile Possibilities |
|
Medium |
| 1080 |
Insufficient Nodes in Root to Leaf Paths |
|
Medium |
| 1081 |
Smallest Subsequence of Distinct Characters |
|
Medium |
| 1082 |
Sales Analysis I |
|
Easy |
| 1083 |
Sales Analysis II |
|
Easy |
| 1084 |
Sales Analysis III |
|
Easy |
| 1085 |
Sum of Digits in the Minimum Number |
|
Easy |
| 1086 |
High Five |
|
Easy |
| 1087 |
Brace Expansion |
|
Medium |
| 1088 |
Confusing Number II |
|
Hard |
| 1089 |
Duplicate Zeros |
|
Easy |
| 1090 |
Largest Values From Labels |
|
Medium |
| 1091 |
Shortest Path in Binary Matrix |
|
Medium |
| 1092 |
Shortest Common Supersequence |
|
Hard |
