Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2506 | Odd String Difference | Easy | ArrayHash TableString |
| 2507 | Once Twice | Medium | ArrayBit Manipulation |
| 2508 | One Edit Distance | Medium | Two PointersString |
| 2509 | Ones and Zeroes | Medium | ArrayStringDynamic Programming |
| 2510 | Online Election | Medium | ArrayHash TableBinary Search |
| 2511 | Online Majority Element In Subarray | Hard | ArrayBinary SearchDesign |
| 2512 | Online Stock Span | Medium | StackDesignMonotonic Stack |
| 2513 | Open the Lock | Medium | ArrayHash TableString |
| 2514 | Operations on Tree | Medium | ArrayHash TableTree |
| 2515 | Optimal Account Balancing | Hard | ArrayDynamic ProgrammingBacktracking |
| 2516 | Optimal Division | Medium | ArrayMathDynamic Programming |
| 2517 | Optimal Partition of String | Medium | Hash TableStringGreedy |
| 2518 | Order Two Columns Independently | Medium | Database |
| 2519 | Orderly Queue | Hard | MathStringSorting |
| 2520 | Out of Boundary Paths | Medium | Dynamic Programming |
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