Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2461 | Number of Unique Flavors After Sharing K Candies | Medium | ArrayHash TableSliding Window |
| 2462 | Number of Unique Good Subsequences | Hard | StringDynamic Programming |
| 2463 | Number of Unique Subjects Taught by Each Teacher | Easy | Database |
| 2464 | Number of Unique XOR Triplets I | Medium | ArrayMathBit Manipulation |
| 2465 | Number of Unique XOR Triplets II | Medium | ArrayMathBit Manipulation |
| 2466 | Number of Valid Clock Times | Easy | StringEnumeration |
| 2467 | Number of Valid Subarrays | Hard | ArrayStackMonotonic Stack |
| 2468 | Number of Valid Words for Each Puzzle | Hard | ArrayHash TableString |
| 2469 | Number of Valid Words in a Sentence | Easy | String |
| 2470 | Number of Ways of Cutting a Pizza | Hard | ArrayDynamic ProgrammingMemoization |
| 2471 | Number of Ways to Arrive at Destination | Medium | Dynamic ProgrammingGraphTopological Sort |
| 2472 | Number of Ways to Assign Edge Weights I | Medium | MathTreeDepth-First Search |
| 2473 | Number of Ways to Assign Edge Weights II | Hard | ArrayMathDynamic Programming |
| 2474 | Number of Ways to Build House of Cards | Medium | MathDynamic Programming |
| 2475 | Number of Ways to Build Sturdy Brick Wall | Medium | ArrayDynamic ProgrammingBit Manipulation |
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