Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1786 | Longest Palindrome | Easy | Hash TableStringGreedy |
| 1787 | Longest Palindrome After Substring Concatenation I | Medium | Two PointersStringDynamic Programming |
| 1788 | Longest Palindrome After Substring Concatenation II | Hard | Two PointersStringDynamic Programming |
| 1789 | Longest Palindrome by Concatenating Two Letter Words | Medium | ArrayHash TableString |
| 1790 | Longest Palindromic Subsequence | Medium | StringDynamic Programming |
| 1791 | Longest Palindromic Subsequence After at Most K Operations | Medium | StringDynamic Programming |
| 1792 | Longest Palindromic Subsequence II | Medium | StringDynamic Programming |
| 1793 | Longest Palindromic Substring | Medium | Two PointersStringDynamic Programming |
| 1794 | Longest Path With Different Adjacent Characters | Hard | ArrayStringTree |
| 1795 | Longest Repeating Character Replacement | Medium | Hash TableStringSliding Window |
| 1796 | Longest Repeating Substring | Medium | StringBinary SearchDynamic Programming |
| 1797 | Longest Special Path | Hard | ArrayHash TableTree |
| 1798 | Longest Special Path II | Hard | ArrayHash TableTree |
| 1799 | Longest Square Streak in an Array | Medium | ArrayHash TableBinary Search |
| 1800 | Longest Strictly Increasing or Strictly Decreasing Subarray | Easy | Array |
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