| Title | Acceptance | Level |
|---|---|---|
| Design HashMap | 61.3% | Easy |
| Best Time to Buy and Sell Stock | 50.5% | Easy |
| Two Sum | 45.6% | Easy |
| Merge Sorted Array | 39.4% | Easy |
| Product of Array Except Self | 60.1% | Medium |
| Number of Islands | 46.8% | Medium |
| Basic Calculator II | 36.9% | Medium |
| Trapping Rain Water | 48.9% | Hard |
| Serialize and Deserialize Binary Tree | 47.5% | Hard |
| N-Queens | 46.6% | Hard |
| Merge k Sorted Lists | 40.2% | Hard |
| The Skyline Problem | 34.6% | Hard |
| Insert Interval | 33.5% | Hard |
| Integer to English Words | 27.1% | Hard |