Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 796 | Longest Increasing Path in a Matrix | Hard | ArrayDynamic ProgrammingDepth-First Search |
| 797 | Longest Increasing Subsequence | Medium | ArrayBinary SearchDynamic Programming |
| 798 | Longest Increasing Subsequence II | Hard | ArrayDivide and ConquerDynamic Programming |
| 799 | Longest Line of Consecutive One in Matrix | Medium | ArrayDynamic ProgrammingMatrix |
| 800 | Longest Mountain in Array | Medium | ArrayTwo PointersDynamic Programming |
| 801 | Longest Nice Subarray | Medium | ArrayBit ManipulationSliding Window |
| 802 | Longest Non-decreasing Subarray From Two Arrays | Medium | ArrayDynamic Programming |
| 803 | Longest Palindrome by Concatenating Two Letter Words | Medium | ArrayHash TableString |
| 804 | Longest Path With Different Adjacent Characters | Hard | ArrayStringTree |
| 805 | Longest Special Path | Hard | ArrayHash TableTree |
| 806 | Longest Special Path II | Hard | ArrayHash TableTree |
| 807 | Longest Square Streak in an Array | Medium | ArrayHash TableBinary Search |
| 808 | Longest Strictly Increasing or Strictly Decreasing Subarray | Easy | Array |
| 809 | Longest String Chain | Medium | ArrayHash TableTwo Pointers |
| 810 | Longest Subarray of 1's After Deleting One Element | Medium | ArrayDynamic ProgrammingSliding Window |
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