Practice problems across 75+ categories
Practice problems frequently asked at Binary Tree • 177 problems | 37 Easy | 122 Medium | 17 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 46 | Construct String from Binary Tree | Medium | StringTreeDepth-First Search |
| 47 | Convert Binary Search Tree to Sorted Doubly Linked List | Medium | Linked ListStackTree |
| 48 | Convert BST to Greater Tree | Medium | TreeDepth-First SearchBinary Search Tree |
| 49 | Convert Sorted Array to Binary Search Tree | Easy | ArrayDivide and ConquerTree |
| 50 | Convert Sorted List to Binary Search Tree | Medium | Linked ListDivide and ConquerTree |
| 51 | Correct a Binary Tree | Medium | Hash TableTreeDepth-First Search |
| 52 | Count Complete Tree Nodes | Easy | Binary SearchBit ManipulationTree |
| 53 | Count Good Nodes in Binary Tree | Medium | TreeDepth-First SearchBreadth-First Search |
| 54 | Count Nodes Equal to Average of Subtree | Medium | TreeDepth-First SearchBinary Tree |
| 55 | Count Nodes Equal to Sum of Descendants | Medium | TreeDepth-First SearchBinary Tree |
| 56 | Count Nodes That Are Great Enough | Hard | Divide and ConquerTreeDepth-First Search |
| 57 | Count Nodes With the Highest Score | Medium | ArrayTreeDepth-First Search |
| 58 | Count Univalue Subtrees | Medium | TreeDepth-First SearchBinary Tree |
| 59 | Cousins in Binary Tree | Easy | TreeDepth-First SearchBreadth-First Search |
| 60 | Cousins in Binary Tree II | Medium | Hash TableTreeDepth-First Search |
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