Practice problems across 75+ categories
Practice problems frequently asked at Tree • 252 problems | 41 Easy | 150 Medium | 60 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 136 | K-th Largest Perfect Subtree Size in Binary Tree | Medium | TreeDepth-First SearchSorting |
| 137 | Kill Process | Medium | ArrayHash TableTree |
| 138 | Kth Ancestor of a Tree Node | Hard | Binary SearchDynamic ProgrammingBit Manipulation |
| 139 | Kth Largest Element in a Stream | Easy | TreeDesignBinary Search Tree |
| 140 | Kth Largest Sum in a Binary Tree | Medium | TreeBreadth-First SearchSorting |
| 141 | Kth Smallest Element in a BST | Medium | TreeDepth-First SearchBinary Search Tree |
| 142 | Kth Smallest Path XOR Sum | Hard | ArrayTreeDepth-First Search |
| 143 | Largest BST Subtree | Medium | Dynamic ProgrammingTreeDepth-First Search |
| 144 | Leaf-Similar Trees | Easy | TreeDepth-First SearchBinary Tree |
| 145 | Linked List in Binary Tree | Medium | Linked ListTreeDepth-First Search |
| 146 | Logical OR of Two Binary Grids Represented as Quad-Trees | Easy | Divide and ConquerTree |
| 147 | Longest Path With Different Adjacent Characters | Hard | ArrayStringTree |
| 148 | Longest Special Path | Hard | ArrayHash TableTree |
| 149 | Longest Special Path II | Hard | ArrayHash TableTree |
| 150 | Longest Univalue Path | Medium | TreeDepth-First SearchBinary Tree |
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