Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1516 | Longest Common Prefix After at Most One Removal | Medium | Two PointersString |
| 1517 | Longest Common Prefix Between Adjacent Strings After Removals | Medium | ArrayString |
| 1518 | Longest Common Prefix of K Strings After Removal | Hard | ArrayStringTrie |
| 1519 | Longest Common Subpath | Hard | ArrayBinary SearchRolling Hash |
| 1520 | Longest Common Subsequence | Medium | StringDynamic Programming |
| 1521 | Longest Common Subsequence Between Sorted Arrays | Medium | ArrayHash TableCounting |
| 1522 | Longest Common Suffix Queries | Hard | ArrayStringTrie |
| 1523 | Longest Continuous Increasing Subsequence | Easy | Array |
| 1524 | Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit | Medium | ArrayQueueSliding Window |
| 1525 | Longest Cycle in a Graph | Hard | Depth-First SearchBreadth-First SearchGraph |
| 1526 | Longest Duplicate Substring | Hard | StringBinary SearchSliding Window |
| 1527 | Longest Even Odd Subarray With Threshold | Easy | ArraySliding Window |
| 1528 | Longest Happy Prefix | Hard | StringRolling HashString Matching |
| 1529 | Longest Happy String | Medium | StringGreedyHeap (Priority Queue) |
| 1530 | Longest Harmonious Subsequence | Easy | ArrayHash TableSliding Window |
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