Practice problems across 75+ categories
Practice problems frequently asked at Union Find • 89 problems | 1 Easy | 43 Medium | 43 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 76 | Properties Graph | Medium | ArrayHash TableDepth-First Search |
| 77 | Rank Transform of a Matrix | Hard | ArrayUnion FindGraph |
| 78 | Reachable Nodes With Restrictions | Medium | ArrayHash TableTree |
| 79 | Redundant Connection | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 80 | Redundant Connection II | Hard | Depth-First SearchBreadth-First SearchUnion Find |
| 81 | Regions Cut By Slashes | Medium | ArrayHash TableDepth-First Search |
| 82 | Remove Max Number of Edges to Keep Graph Fully Traversable | Hard | Union FindGraph |
| 83 | Satisfiability of Equality Equations | Medium | ArrayStringUnion Find |
| 84 | Sentence Similarity II | Medium | ArrayHash TableString |
| 85 | Similar String Groups | Hard | ArrayHash TableString |
| 86 | Smallest Missing Genetic Value in Each Subtree | Hard | Dynamic ProgrammingTreeDepth-First Search |
| 87 | Smallest String With Swaps | Medium | ArrayHash TableString |
| 88 | Subarray With Elements Greater Than Varying Threshold | Hard | ArrayStackUnion Find |
| 89 | Sum of Remoteness of All Cells | Medium | ArrayHash TableDepth-First Search |
| 90 | Surrounded Regions | Medium | ArrayDepth-First SearchBreadth-First Search |
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