Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1516 | Longest Common Subsequence Between Sorted Arrays | Medium | ArrayHash TableCounting |
| 1517 | Longest Common Suffix Queries | Hard | ArrayStringTrie |
| 1518 | Longest Continuous Increasing Subsequence | Easy | Array |
| 1519 | Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit | Medium | ArrayQueueSliding Window |
| 1520 | Longest Cycle in a Graph | Hard | Depth-First SearchBreadth-First SearchGraph |
| 1521 | Longest Duplicate Substring | Hard | StringBinary SearchSliding Window |
| 1522 | Longest Even Odd Subarray With Threshold | Easy | ArraySliding Window |
| 1523 | Longest Happy Prefix | Hard | StringRolling HashString Matching |
| 1524 | Longest Happy String | Medium | StringGreedyHeap (Priority Queue) |
| 1525 | Longest Harmonious Subsequence | Easy | ArrayHash TableSliding Window |
| 1526 | Longest Ideal Subsequence | Medium | Hash TableStringDynamic Programming |
| 1527 | Longest Increasing Path in a Matrix | Hard | ArrayDynamic ProgrammingDepth-First Search |
| 1528 | Longest Increasing Subsequence | Medium | ArrayBinary SearchDynamic Programming |
| 1529 | Longest Increasing Subsequence II | Hard | ArrayDivide and ConquerDynamic Programming |
| 1530 | Longest Line of Consecutive One in Matrix | Medium | ArrayDynamic ProgrammingMatrix |
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