Practice problems across 75+ categories
Practice problems frequently asked at Graph • 169 problems | 3 Easy | 79 Medium | 85 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Cat and Mouse II | Hard | ArrayMathDynamic Programming |
| 17 | Cheapest Flights Within K Stops | Medium | Dynamic ProgrammingDepth-First SearchBreadth-First Search |
| 18 | Check for Contradictions in Equations | Hard | ArrayDepth-First SearchUnion Find |
| 19 | Checking Existence of Edge Length Limited Paths | Hard | ArrayTwo PointersUnion Find |
| 20 | Checking Existence of Edge Length Limited Paths II | Hard | Union FindGraphMinimum Spanning Tree |
| 21 | Classroom Seating Conflict | Easy | GraphBFSBipartite |
| 22 | Clone Graph | Medium | Hash TableDepth-First SearchBreadth-First Search |
| 23 | Collect Coins in a Tree | Hard | ArrayTreeGraph |
| 24 | Connected Components | Medium | GraphsGraphBFS/DFS |
| 25 | Connecting Cities With Minimum Cost | Medium | Union FindGraphHeap (Priority Queue) |
| 26 | Construct 2D Grid Matching Graph Layout | Hard | ArrayHash TableGraph |
| 27 | Count Pairs Of Nodes | Hard | ArrayHash TableTwo Pointers |
| 28 | Count the Number of Complete Components | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 29 | Count the Number of Houses at a Certain Distance I | Medium | Breadth-First SearchGraphPrefix Sum |
| 30 | Count the Number of Houses at a Certain Distance II | Hard | GraphPrefix Sum |
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