| Binary Tree Maximum Path Sum | Hard | 42.0% | 98.7% |
| Evaluate Division | Medium | 64.0% | 72.3% |
| Serialize and Deserialize Binary Tree | Hard | 60.4% | 67.4% |
| Number of Islands | Medium | 63.8% | 61.1% |
| Couples Holding Hands | Hard | 59.2% | 57.1% |
| Validate Binary Search Tree | Medium | 35.4% | 57.1% |
| Design Search Autocomplete System | Hard | 49.7% | 52.2% |
| Sort Items by Groups Respecting Dependencies | Hard | 65.6% | 45.9% |
| Minimum Height Trees | Medium | 42.4% | 45.9% |
| Alien Dictionary | Hard | 37.1% | 45.9% |
| Longest Increasing Path in a Matrix | Hard | 56.3% | 45.9% |
| Word Search | Medium | 46.9% | 45.9% |
| Populating Next Right Pointers in Each Node II | Medium | 57.1% | 37.1% |
| Populating Next Right Pointers in Each Node | Medium | 66.9% | 37.1% |
| Course Schedule II | Medium | 55.0% | 37.1% |
| Course Schedule | Medium | 50.8% | 37.1% |
