Practice problems across 75+ categories
Practice problems frequently asked at Tree • 252 problems | 41 Easy | 150 Medium | 60 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Binary Tree Level Order Traversal II | Medium | TreeBreadth-First SearchBinary Tree |
| 17 | Binary Tree Longest Consecutive Sequence | Medium | TreeDepth-First SearchBinary Tree |
| 18 | Binary Tree Longest Consecutive Sequence II | Medium | TreeDepth-First SearchBinary Tree |
| 19 | Binary Tree Maximum Path Sum | Hard | Dynamic ProgrammingTreeDepth-First Search |
| 20 | Binary Tree Paths | Easy | StringBacktrackingTree |
| 21 | Binary Tree Postorder Traversal | Easy | StackTreeDepth-First Search |
| 22 | Binary Tree Preorder Traversal | Easy | StackTreeDepth-First Search |
| 23 | Binary Tree Pruning | Medium | TreeDepth-First SearchBinary Tree |
| 24 | Binary Tree Right Side View | Medium | TreeDepth-First SearchBreadth-First Search |
| 25 | Binary Tree Tilt | Easy | TreeDepth-First SearchBinary Tree |
| 26 | Binary Tree Upside Down | Medium | TreeDepth-First SearchBinary Tree |
| 27 | Binary Tree Vertical Order Traversal | Medium | Hash TableTreeDepth-First Search |
| 28 | Binary Tree Zigzag Level Order Traversal | Medium | TreeBreadth-First SearchBinary Tree |
| 29 | Boundary of Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
| 30 | Build Binary Expression Tree From Infix Expression | Hard | StringStackTree |
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