Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1531 | Longest Ideal Subsequence | Medium | Hash TableStringDynamic Programming |
| 1532 | Longest Increasing Path in a Matrix | Hard | ArrayDynamic ProgrammingDepth-First Search |
| 1533 | Longest Increasing Subsequence | Medium | ArrayBinary SearchDynamic Programming |
| 1534 | Longest Increasing Subsequence II | Hard | ArrayDivide and ConquerDynamic Programming |
| 1535 | Longest Line of Consecutive One in Matrix | Medium | ArrayDynamic ProgrammingMatrix |
| 1536 | Longest Mountain in Array | Medium | ArrayTwo PointersDynamic Programming |
| 1537 | Longest Nice Subarray | Medium | ArrayBit ManipulationSliding Window |
| 1538 | Longest Nice Substring | Easy | Hash TableStringDivide and Conquer |
| 1539 | Longest Non-decreasing Subarray From Two Arrays | Medium | ArrayDynamic Programming |
| 1540 | Longest Palindrome | Easy | Hash TableStringGreedy |
| 1541 | Longest Palindrome After Substring Concatenation I | Medium | Two PointersStringDynamic Programming |
| 1542 | Longest Palindrome After Substring Concatenation II | Hard | Two PointersStringDynamic Programming |
| 1543 | Longest Palindrome by Concatenating Two Letter Words | Medium | ArrayHash TableString |
| 1544 | Longest Palindromic Subsequence | Medium | StringDynamic Programming |
| 1545 | Longest Palindromic Subsequence After at Most K Operations | Medium | StringDynamic Programming |
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