Practice problems across 75+ categories
Practice problems frequently asked at Facebook • 275 problems | 55 Easy | 175 Medium | 42 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 196 | Populating Next Right Pointers in Each Node | Medium | Linked ListTreeDepth-First Search |
| 197 | Positions of Large Groups | Easy | String |
| 198 | Pour Water | Medium | ArraySimulation |
| 199 | Pow(x, n) | Medium | MathRecursion |
| 200 | Properties Graph | Medium | ArrayHash TableDepth-First Search |
| 201 | Push Dominoes | Medium | Two PointersStringDynamic Programming |
| 202 | Random Flip Matrix | Medium | Hash TableMathReservoir Sampling |
| 203 | Random Pick Index | Medium | Hash TableMathReservoir Sampling |
| 204 | Random Pick with Weight | Medium | ArrayMathBinary Search |
| 205 | Random Point in Non-overlapping Rectangles | Medium | ArrayMathBinary Search |
| 206 | Range Addition | Medium | ArrayPrefix Sum |
| 207 | Reachable Nodes In Subdivided Graph | Hard | GraphHeap (Priority Queue)Shortest Path |
| 208 | Read N Characters Given Read4 | Easy | ArraySimulationInteractive |
| 209 | Reconstruct Itinerary | Hard | Depth-First SearchGraphEulerian Circuit |
| 210 | Reduce Array Size to The Half | Medium | ArrayHash TableGreedy |
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