Practice problems across 75+ categories
Practice problems frequently asked at Binary Tree • 177 problems | 37 Easy | 122 Medium | 17 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 136 | Most Frequent Subtree Sum | Medium | Hash TableTreeDepth-First Search |
| 137 | Number of Good Leaf Nodes Pairs | Medium | TreeDepth-First SearchBinary Tree |
| 138 | Number of Nodes With Value One | Medium | ArrayTreeDepth-First Search |
| 139 | Number of Ways to Reorder Array to Get Same BST | Hard | ArrayMathDivide and Conquer |
| 140 | Path In Zigzag Labelled Binary Tree | Medium | MathTreeBinary Tree |
| 141 | Path Sum | Easy | TreeDepth-First SearchBreadth-First Search |
| 142 | Path Sum II | Medium | BacktrackingTreeDepth-First Search |
| 143 | Path Sum III | Medium | TreeDepth-First SearchBinary Tree |
| 144 | Path Sum IV | Medium | ArrayHash TableTree |
| 145 | Populating Next Right Pointers in Each Node | Medium | Linked ListTreeDepth-First Search |
| 146 | Populating Next Right Pointers in Each Node II | Medium | Linked ListTreeDepth-First Search |
| 147 | Print Binary Tree | Medium | TreeDepth-First SearchBreadth-First Search |
| 148 | Pseudo-Palindromic Paths in a Binary Tree | Medium | Bit ManipulationTreeDepth-First Search |
| 149 | Range Sum of BST | Easy | TreeDepth-First SearchBinary Search Tree |
| 150 | Range XOR Queries with Subarray Reversals | Hard | ArrayTreeBinary Tree |
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