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| Status | Title | Acceptance | Difficulty |
|---|---|---|---|
| 1. Two Sum | 51.2% | Easy | |
| 2. Add Two Numbers | 42.5% | Medium | |
| 3. Longest Substring Without Repeating Characters | 34.3% | Medium | |
| 4. Median of Two Sorted Arrays | 39.6% | Hard | |
| 5. Longest Palindromic Substring | 33.7% | Medium | |
| 6. Zigzag Conversion | 46.3% | Medium | |
| 7. Reverse Integer | 28.3% | Medium | |
| 8. String to Integer (atoi) | 17.2% | Medium | |
| 9. Palindrome Number | 55.4% | Easy | |
| 10. Regular Expression Matching | 28.3% | Hard | |
| 11. Container With Most Water | 54.6% | Medium | |
| 12. Integer to Roman | 64.3% | Medium | |
| 13. Roman to Integer | 60.4% | Easy | |
| 14. Longest Common Prefix | 42.5% | Easy | |
| 15. 3Sum | 34.1% | Medium | |
| 16. 3Sum Closest | 45.7% | Medium | |
| 17. Letter Combinations of a Phone Number | 60.1% | Medium | |
| 18. 4Sum | 36.6% | Medium | |
| 19. Remove Nth Node From End of List | 44.0% | Medium | |
| 20. Valid Parentheses | 40.5% | Easy | |
| 21. Merge Two Sorted Lists | 63.7% | Easy | |
| 22. Generate Parentheses | 74.3% | Medium | |
| 23. Merge k Sorted Lists | 51.8% | Hard | |
| 24. Swap Nodes in Pairs | 63.8% | Medium | |
| 25. Reverse Nodes in k-Group | 58.2% | Hard | |
| 26. Remove Duplicates from Sorted Array | 55.0% | Easy | |
| 27. Remove Element | 55.9% | Easy | |
| 28. Find the Index of the First Occurrence in a String | 41.6% | Easy | |
| 29. Divide Two Integers | 17.4% | Medium | |
| 30. Substring with Concatenation of All Words | 32.0% | Hard | |
| 31. Next Permutation | 39.4% | Medium | |
| 32. Longest Valid Parentheses | 33.7% | Hard | |
| 33. Search in Rotated Sorted Array | 40.3% | Medium | |
| 34. Find First and Last Position of Element in Sorted Array | 44.0% | Medium | |
| 35. Search Insert Position | 44.9% | Easy | |
| 36. Valid Sudoku | 59.2% | Medium | |
| 37. Sudoku Solver | 60.1% | Hard | |
| 38. Count and Say | 54.6% | Medium | |
| 39. Combination Sum | 71.1% | Medium | |
| 40. Combination Sum II | 55.2% | Medium | |
| 41. First Missing Positive | 38.1% | Hard | |
| 42. Trapping Rain Water | 61.3% | Hard | |
| 43. Multiply Strings | 39.9% | Medium | |
| 44. Wildcard Matching | 27.6% | Hard | |
| 45. Jump Game II | 40.2% | Medium | |
| 46. Permutations | 78.2% | Medium | |
| 47. Permutations II | 58.7% | Medium | |
| 48. Rotate Image | 74.1% | Medium | |
| 49. Group Anagrams | 68.2% | Medium | |
| 50. Pow(x, n) | 34.3% | Medium |