Practice problems across 75+ categories
Practice problems frequently asked at Facebook • 275 problems | 55 Easy | 175 Medium | 42 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 61 | Divide Two Integers | Medium | MathBit Manipulation |
| 62 | Election Results | Medium | Database |
| 63 | Employee Importance | Medium | ArrayHash TableTree |
| 64 | Encode Number | Medium | MathStringBit Manipulation |
| 65 | Escape a Large Maze | Hard | ArrayHash TableDepth-First Search |
| 66 | Evaluate Division | Medium | ArrayStringDepth-First Search |
| 67 | Expression Add Operators | Hard | MathStringBacktracking |
| 68 | Falling Squares | Hard | ArraySegment TreeOrdered Set |
| 69 | Find a Corresponding Node of a Binary Tree in a Clone of That Tree | Easy | TreeDepth-First SearchBreadth-First Search |
| 70 | Find a Peak Element II | Medium | ArrayBinary SearchMatrix |
| 71 | Find All Anagrams in a String | Medium | Hash TableStringSliding Window |
| 72 | Find All The Lonely Nodes | Easy | TreeDepth-First SearchBreadth-First Search |
| 73 | Find and Replace Pattern | Medium | ArrayHash TableString |
| 74 | Find Bottom Left Tree Value | Medium | TreeDepth-First SearchBreadth-First Search |
| 75 | Find in Mountain Array | Hard | ArrayBinary SearchInteractive |
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