Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2506 | Online Stock Span | Medium | StackDesignMonotonic Stack |
| 2507 | Open the Lock | Medium | ArrayHash TableString |
| 2508 | Operations on Tree | Medium | ArrayHash TableTree |
| 2509 | Optimal Account Balancing | Hard | ArrayDynamic ProgrammingBacktracking |
| 2510 | Optimal Division | Medium | ArrayMathDynamic Programming |
| 2511 | Optimal Partition of String | Medium | Hash TableStringGreedy |
| 2512 | Order Two Columns Independently | Medium | Database |
| 2513 | Orderly Queue | Hard | MathStringSorting |
| 2514 | Orders With Maximum Quantity Above Average | Medium | Database |
| 2515 | Out of Boundary Paths | Medium | Dynamic Programming |
| 2516 | Output Contest Matches | Medium | StringRecursionSimulation |
| 2517 | Pacific Atlantic Water Flow | Medium | ArrayDepth-First SearchBreadth-First Search |
| 2518 | Paint Fence | Medium | Dynamic Programming |
| 2519 | Paint House | Medium | ArrayDynamic Programming |
| 2520 | Paint House II | Hard | ArrayDynamic Programming |
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