Practice problems across 75+ categories
Practice problems frequently asked at Union Find • 89 problems | 1 Easy | 43 Medium | 43 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Data Stream as Disjoint Intervals | Hard | Hash TableBinary SearchUnion Find |
| 17 | Delivery Route Exists | Easy | GraphBFSDFS |
| 18 | Detect Cycles in 2D Grid | Medium | ArrayDepth-First SearchBreadth-First Search |
| 19 | Distance to a Cycle in Undirected Graph | Hard | Depth-First SearchBreadth-First SearchUnion Find |
| 20 | Divide Nodes Into the Maximum Number of Groups | Hard | Depth-First SearchBreadth-First SearchUnion Find |
| 21 | Evaluate Division | Medium | ArrayStringDepth-First Search |
| 22 | Find All People With Secret | Hard | Depth-First SearchBreadth-First SearchUnion Find |
| 23 | Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree | Hard | Union FindGraphSorting |
| 24 | Find if Path Exists in Graph | Easy | Depth-First SearchBreadth-First SearchUnion Find |
| 25 | Find the Safest Path in a Grid | Medium | ArrayBinary SearchBreadth-First Search |
| 26 | Find the String with LCP | Hard | ArrayStringDynamic Programming |
| 27 | GCD Sort of an Array | Hard | ArrayMathUnion Find |
| 28 | Graph Connectivity With Threshold | Hard | ArrayMathUnion Find |
| 29 | Graph Valid Tree | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 30 | Greatest Common Divisor Traversal | Hard | ArrayMathUnion Find |
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