| No. | Title | Mark |
|---|---|---|
| 100 | Same Tree | |
| 102 | Binary Tree Level Order Traversal | |
| 103 | Binary Tree Zigzag Level Order Traversal | |
| 104 | Maximum Depth of Binary Tree | |
| 107 | Binary Tree Level Order Traversal II | |
| 116 | Populating Next Right Pointers in Each Node | |
| 117 | Populating Next Right Pointers in Each Node II | |
| 130 | Surrounded Regions | |
| 133 | Clone Graph | |
| 200 | Number of Islands | template |
| 279 | Perfect Squares | |
| 297 | Serialize and Deserialize Binary Tree | |
| 322 | Coin Change | |
| 329 | Longest Increasing Path in a Matrix | template |
| 404 | Sum of Left Leaves | |
| 449 | Serialize and Deserialize BST | |
| 529 | Minesweeper | |
| 542 | 01 Matrix | |
| 652 | Find Duplicate Subtrees | |
| 733 | Flood Fill | |
| 801 | Is Graph Bipartite? | |
| 813 | All Paths From Source to Target | |
| 871 | Keys and Rooms |