Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2581 | Peaks in Array | Hard | ArrayBinary Indexed TreeSegment Tree |
| 2582 | Peeking Iterator | Medium | ArrayDesignIterator |
| 2583 | People Whose List of Favorite Companies Is Not a Subset of Another List | Medium | ArrayHash TableString |
| 2584 | Percentage of Letter in String | Easy | String |
| 2585 | Percentage of Users Attended a Contest | Easy | Database |
| 2586 | Perfect Number | Easy | Math |
| 2587 | Perfect Rectangle | Hard | ArrayHash TableMath |
| 2588 | Perfect Squares | Medium | MathDynamic ProgrammingBreadth-First Search |
| 2589 | Perform String Shifts | Easy | ArrayMathString |
| 2590 | Permutation Difference between Two Strings | Easy | Hash TableString |
| 2591 | Permutation in String | Medium | Hash TableTwo PointersString |
| 2592 | Permutation Sequence | Hard | MathRecursion |
| 2593 | Permutations | Medium | ArrayBacktracking |
| 2594 | Permutations II | Medium | ArrayBacktrackingSorting |
| 2595 | Permutations III | Medium | ArrayBacktracking |
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