Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1501 | Lonely Pixel II | Medium | ArrayHash TableMatrix |
| 1502 | Long Pressed Name | Easy | Two PointersString |
| 1503 | Longer Contiguous Segments of Ones than Zeros | Easy | String |
| 1504 | Longest Absolute File Path | Medium | StringStackDepth-First Search |
| 1505 | Longest Alternating Subarray | Easy | ArrayEnumeration |
| 1506 | Longest Arithmetic Subsequence | Medium | ArrayHash TableBinary Search |
| 1507 | Longest Arithmetic Subsequence of Given Difference | Medium | ArrayHash TableDynamic Programming |
| 1508 | Longest Binary Subsequence Less Than or Equal to K | Medium | StringDynamic ProgrammingGreedy |
| 1509 | Longest Chunked Palindrome Decomposition | Hard | Two PointersStringDynamic Programming |
| 1510 | Longest Common Prefix | Easy | ArrayStringTrie |
| 1511 | Longest Common Prefix After at Most One Removal | Medium | Two PointersString |
| 1512 | Longest Common Prefix Between Adjacent Strings After Removals | Medium | ArrayString |
| 1513 | Longest Common Prefix of K Strings After Removal | Hard | ArrayStringTrie |
| 1514 | Longest Common Subpath | Hard | ArrayBinary SearchRolling Hash |
| 1515 | Longest Common Subsequence | Medium | StringDynamic Programming |
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