Practice problems across 75+ categories
Practice problems frequently asked at Tree • 252 problems | 41 Easy | 150 Medium | 60 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 61 | Correct a Binary Tree | Medium | Hash TableTreeDepth-First Search |
| 62 | Count Complete Tree Nodes | Easy | Binary SearchBit ManipulationTree |
| 63 | Count Good Nodes in Binary Tree | Medium | TreeDepth-First SearchBreadth-First Search |
| 64 | Count Nodes Equal to Average of Subtree | Medium | TreeDepth-First SearchBinary Tree |
| 65 | Count Nodes Equal to Sum of Descendants | Medium | TreeDepth-First SearchBinary Tree |
| 66 | Count Nodes That Are Great Enough | Hard | Divide and ConquerTreeDepth-First Search |
| 67 | Count Nodes With the Highest Score | Medium | ArrayTreeDepth-First Search |
| 68 | Count Number of Possible Root Nodes | Hard | ArrayHash TableDynamic Programming |
| 69 | Count Pairs of Connectable Servers in a Weighted Tree Network | Medium | ArrayTreeDepth-First Search |
| 70 | Count Paths That Can Form a Palindrome in a Tree | Hard | Dynamic ProgrammingBit ManipulationTree |
| 71 | Count Subtrees With Max Distance Between Cities | Hard | Dynamic ProgrammingBit ManipulationTree |
| 72 | Count the Number of Good Nodes | Medium | TreeDepth-First Search |
| 73 | Count Univalue Subtrees | Medium | TreeDepth-First SearchBinary Tree |
| 74 | Count Valid Paths in a Tree | Hard | MathDynamic ProgrammingTree |
| 75 | Count Ways to Build Rooms in an Ant Colony | Hard | MathDynamic ProgrammingTree |
Powerful online tools to boost your productivity
Coding Ground For Developers
Code, Edit, Run and ShareIgnite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.
