Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1411 | Number of Enclaves | Medium | ArrayDepth-First SearchBreadth-First Search |
| 1412 | Number of Equal Numbers Blocks | Medium | ArrayBinary SearchInteractive |
| 1413 | Number of Equivalent Domino Pairs | Easy | ArrayHash TableCounting |
| 1414 | Number of Excellent Pairs | Hard | ArrayHash TableBinary Search |
| 1415 | Number of Flowers in Full Bloom | Hard | ArrayHash TableBinary Search |
| 1416 | Number of Good Pairs | Easy | ArrayHash TableMath |
| 1417 | Number of Good Paths | Hard | ArrayHash TableTree |
| 1418 | Number of Great Partitions | Hard | ArrayDynamic Programming |
| 1419 | Number of Increasing Paths in a Grid | Hard | ArrayDynamic ProgrammingDepth-First Search |
| 1420 | Number of Islands | Medium | ArrayDepth-First SearchBreadth-First Search |
| 1421 | Number of Islands II | Hard | ArrayHash TableUnion Find |
| 1422 | Number of Laser Beams in a Bank | Medium | ArrayMathString |
| 1423 | Number of Lines To Write String | Easy | ArrayString |
| 1424 | Number of Longest Increasing Subsequence | Medium | ArrayDynamic ProgrammingBinary Indexed Tree |
| 1425 | Number of Matching Subsequences | Medium | ArrayHash TableString |
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