Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2416 | Number of Paths with Max Score | Hard | ArrayDynamic ProgrammingMatrix |
| 2417 | Number of People Aware of a Secret | Medium | Dynamic ProgrammingQueueSimulation |
| 2418 | Number of People That Can Be Seen in a Grid | Medium | ArrayStackMatrix |
| 2419 | Number of Possible Sets of Closing Branches | Hard | Bit ManipulationGraphHeap (Priority Queue) |
| 2420 | Number of Provinces | Unknown | Depth-First SearchBreadth-First SearchUnion Find |
| 2421 | Number of Recent Calls | Easy | DesignQueueData Stream |
| 2422 | Number Of Rectangles That Can Form The Largest Square | Easy | Array |
| 2423 | Number of Restricted Paths From First to Last Node | Medium | Dynamic ProgrammingGraphTopological Sort |
| 2424 | Number of Same-End Substrings | Medium | ArrayHash TableString |
| 2425 | Number of Segments in a String | Easy | String |
| 2426 | Number of Self-Divisible Permutations | Medium | ArrayMathDynamic Programming |
| 2427 | Number of Senior Citizens | Easy | ArrayString |
| 2428 | Number of Sets of K Non-Overlapping Line Segments | Medium | MathDynamic ProgrammingCombinatorics |
| 2429 | Number of Ships in a Rectangle | Hard | ArrayDivide and ConquerInteractive |
| 2430 | Number of Single Divisor Triplets | Medium | Math |
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