Practice problems across 75+ categories
Practice problems frequently asked at Tree • 252 problems | 41 Easy | 150 Medium | 60 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 106 | Find Elements in a Contaminated Binary Tree | Medium | Hash TableTreeDepth-First Search |
| 107 | Find Largest Value in Each Tree Row | Medium | TreeDepth-First SearchBreadth-First Search |
| 108 | Find Leaves of Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
| 109 | Find Minimum Diameter After Merging Two Trees | Hard | TreeDepth-First SearchBreadth-First Search |
| 110 | Find Mode in Binary Search Tree | Easy | TreeDepth-First SearchBinary Search Tree |
| 111 | Find Nearest Right Node in Binary Tree | Medium | TreeBreadth-First SearchBinary Tree |
| 112 | Find Number of Coins to Place in Tree Nodes | Hard | Dynamic ProgrammingTreeDepth-First Search |
| 113 | Find Root of N-Ary Tree | Medium | Hash TableBit ManipulationTree |
| 114 | Find Subtree Sizes After Changes | Medium | ArrayHash TableString |
| 115 | Find the Last Marked Nodes in Tree | Hard | TreeDepth-First Search |
| 116 | Find the Level of Tree with Minimum Sum | Medium | TreeDepth-First SearchBreadth-First Search |
| 117 | Find the Maximum Sum of Node Values | Hard | ArrayDynamic ProgrammingGreedy |
| 118 | Find Weighted Median Node in Tree | Hard | ArrayBinary SearchDynamic Programming |
| 119 | Flatten Binary Tree to Linked List | Medium | Linked ListStackTree |
| 120 | Flatten Nested List Iterator | Medium | StackTreeDepth-First Search |
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