Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1546 | Longest Palindromic Subsequence II | Medium | StringDynamic Programming |
| 1547 | Longest Palindromic Substring | Medium | Two PointersStringDynamic Programming |
| 1548 | Longest Path With Different Adjacent Characters | Hard | ArrayStringTree |
| 1549 | Longest Repeating Character Replacement | Medium | Hash TableStringSliding Window |
| 1550 | Longest Repeating Substring | Medium | StringBinary SearchDynamic Programming |
| 1551 | Longest Special Path II | Hard | ArrayHash TableTree |
| 1552 | Longest Square Streak in an Array | Medium | ArrayHash TableBinary Search |
| 1553 | Longest Strictly Increasing or Strictly Decreasing Subarray | Easy | Array |
| 1554 | Longest String Chain | Medium | ArrayHash TableTwo Pointers |
| 1555 | Longest Subarray of 1's After Deleting One Element | Medium | ArrayDynamic ProgrammingSliding Window |
| 1556 | Longest Subarray With Maximum Bitwise AND | Medium | ArrayBit ManipulationBrainteaser |
| 1557 | Longest Subsequence Repeated k Times | Hard | StringBacktrackingGreedy |
| 1558 | Longest Subsequence With Decreasing Adjacent Difference | Medium | ArrayDynamic Programming |
| 1559 | Longest Subsequence With Limited Sum | Easy | ArrayBinary SearchGreedy |
| 1560 | Longest Substring Of All Vowels in Order | Medium | StringSliding Window |
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