Practice problems across 75+ categories
Practice problems frequently asked at Graph • 169 problems | 3 Easy | 79 Medium | 85 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 31 | Count Unreachable Pairs of Nodes in an Undirected Graph | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 32 | Count Visited Nodes in a Directed Graph | Hard | Dynamic ProgrammingGraphMemoization |
| 33 | Count Ways to Build Rooms in an Ant Colony | Hard | MathDynamic ProgrammingTree |
| 34 | Couples Holding Hands | Hard | GreedyDepth-First SearchBreadth-First Search |
| 35 | Course Schedule | Medium | Depth-First SearchBreadth-First SearchGraph |
| 36 | Course Schedule II | Medium | Depth-First SearchBreadth-First SearchGraph |
| 37 | Course Schedule IV | Medium | Depth-First SearchBreadth-First SearchGraph |
| 38 | Cracking the Safe | Hard | Depth-First SearchGraphEulerian Circuit |
| 39 | Critical Connections in a Network | Hard | Depth-First SearchGraphBiconnected Component |
| 40 | Cycle Detection in Graph | Medium | GraphsGraphDFS |
| 41 | Delivery Route Exists | Easy | GraphBFSDFS |
| 42 | Design Excel Sum Formula | Unknown | ArrayHash TableString |
| 43 | Design Graph With Shortest Path Calculator | Hard | GraphDesignHeap (Priority Queue) |
| 44 | Detonate the Maximum Bombs | Medium | ArrayMathDepth-First Search |
| 45 | DFS Traversal | Medium | GraphsGraphStack/Recursion |
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