| Number of Islands | Medium | 63.8% | 85.5% |
| Course Schedule II | Medium | 55.0% | 73.5% |
| Course Schedule | Medium | 50.8% | 73.5% |
| Lowest Common Ancestor of a Binary Tree | Medium | 68.8% | 64.6% |
| Maximum Depth of Binary Tree | Easy | 77.9% | 52.8% |
| Binary Tree Paths | Easy | 68.2% | 52.8% |
| Array Nesting | Medium | 56.5% | 52.8% |
| Flatten Nested List Iterator | Medium | 65.6% | 50.7% |
| Serialize and Deserialize Binary Tree | Hard | 60.4% | 50.7% |
| Flood Fill | Easy | 67.9% | 45.7% |
| Serialize and Deserialize N-ary Tree | Hard | 68.6% | 39.0% |
| Path Sum | Easy | 54.5% | 39.0% |
| Cheapest Flights Within K Stops | Medium | 41.4% | 39.0% |
| Keys and Rooms | Medium | 75.5% | 39.0% |
| Word Search | Medium | 46.9% | 39.0% |
| Binary Tree Vertical Order Traversal | Medium | 57.8% | 34.7% |
| Binary Tree Maximum Path Sum | Hard | 42.0% | 34.7% |
| Alien Dictionary | Hard | 37.1% | 34.7% |
| Design Add and Search Words Data Structure | Medium | 48.2% | 34.7% |
| Validate Binary Search Tree | Medium | 35.4% | 29.1% |
| Island Perimeter | Easy | 74.3% | 29.1% |
| Same Tree | Easy | 66.7% | 29.1% |
| Reconstruct Itinerary | Hard | 44.3% | 29.1% |
| Find Largest Value in Each Tree Row | Medium | 66.3% | 29.1% |
| Binary Tree Right Side View | Medium | 69.5% | 29.1% |
| Longest Increasing Path in a Matrix | Hard | 56.3% | 29.1% |
| All Nodes Distance K in Binary Tree | Medium | 67.4% | 21.7% |
| Find Distance in a Binary Tree | Medium | 74.3% | 21.7% |
| Symmetric Tree | Easy | 60.8% | 21.7% |
| Lowest Common Ancestor of a Binary Search Tree | Medium | 70.1% | 21.7% |
| Diameter of Binary Tree | Easy | 65.1% | 21.7% |
| Similar String Groups | Hard | 56.1% | 21.7% |
| Web Crawler Multithreaded | Medium | 51.0% | 21.7% |
| Clone Graph | Medium | 64.7% | 21.7% |
| Max Area of Island | Medium | 73.8% | 21.7% |
| Water and Jug Problem | Medium | 45.0% | 21.7% |
| Sentence Similarity II | Medium | 51.1% | 21.7% |
| The Maze | Medium | 60.3% | 21.7% |
| Evaluate Division | Medium | 64.0% | 21.7% |
| Balanced Binary Tree | Easy | 57.9% | 21.7% |
