1,464 problems · Solve with AI-powered hints & explanations
| # | Title | Difficulty |
|---|---|---|
| 2 | Add Two Numbers | Medium |
| 3 | Longest Substring Without Repeating Characters | Medium |
| 5 | Longest Palindromic Substring |
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| Medium |
| 6 | Zigzag Conversion | Medium |
| 7 | Reverse Integer | Medium |
| 8 | String to Integer (atoi) | Medium |
| 11 | Container With Most Water | Medium |
| 12 | Integer to Roman | Medium |
| 15 | 3Sum | Medium |
| 16 | 3Sum Closest | Medium |
| 17 | Letter Combinations of a Phone Number | Medium |
| 18 | 4Sum | Medium |
| 19 | Remove Nth Node From End of List | Medium |
| 22 | Generate Parentheses | Medium |
| 24 | Swap Nodes in Pairs | Medium |
| 29 | Divide Two Integers | Medium |
| 31 | Next Permutation | Medium |
| 33 | Search in Rotated Sorted Array | Medium |
| 34 | Find First and Last Position of Element in Sorted Array | Medium |
| 36 | Valid Sudoku | Medium |
| 38 | Count and Say | Medium |
| 39 | Combination Sum | Medium |
| 40 | Combination Sum II | Medium |
| 43 | Multiply Strings | Medium |
| 45 | Jump Game II | Medium |
| 46 | Permutations | Medium |
| 47 | Permutations II | Medium |
| 48 | Rotate Image | Medium |
| 49 | Group Anagrams | Medium |
| 50 | Pow(x, n) | Medium |
| 53 | Maximum Subarray | Medium |
| 54 | Spiral Matrix | Medium |
| 55 | Jump Game | Medium |
| 56 | Merge Intervals | Medium |
| 57 | Insert Interval | Medium |
| 59 | Spiral Matrix II | Medium |
| 61 | Rotate List | Medium |
| 62 | Unique Paths | Medium |
| 63 | Unique Paths II | Medium |
| 64 | Minimum Path Sum | Medium |
| 71 | Simplify Path | Medium |
| 72 | Edit Distance | Medium |
| 73 | Set Matrix Zeroes | Medium |
| 74 | Search a 2D Matrix | Medium |
| 75 | Sort Colors | Medium |
| 77 | Combinations | Medium |
| 78 | Subsets | Medium |
| 79 | Word Search | Medium |
| 80 | Remove Duplicates from Sorted Array II | Medium |
| 81 | Search in Rotated Sorted Array II | Medium |
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