Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1441 | Number of Flowers in Full Bloom | Hard | ArrayHash TableBinary Search |
| 1442 | Number of Good Pairs | Easy | ArrayHash TableMath |
| 1443 | Number of Good Paths | Hard | ArrayHash TableTree |
| 1444 | Number of Great Partitions | Hard | ArrayDynamic Programming |
| 1445 | Number of Increasing Paths in a Grid | Hard | ArrayDynamic ProgrammingDepth-First Search |
| 1446 | Number of Islands | Medium | ArrayDepth-First SearchBreadth-First Search |
| 1447 | Number of Islands II | Hard | ArrayHash TableUnion Find |
| 1448 | Number of Laser Beams in a Bank | Medium | ArrayMathString |
| 1449 | Number of Lines To Write String | Easy | ArrayString |
| 1450 | Number of Longest Increasing Subsequence | Medium | ArrayDynamic ProgrammingBinary Indexed Tree |
| 1451 | Number of Matching Subsequences | Medium | ArrayHash TableString |
| 1452 | Number of Nodes With Value One | Medium | ArrayTreeDepth-First Search |
| 1453 | Number of Orders in the Backlog | Medium | ArrayHeap (Priority Queue)Simulation |
| 1454 | Number of Pairs of Interchangeable Rectangles | Medium | ArrayHash TableMath |
| 1455 | Number of Pairs of Strings With Concatenation Equal to Target | Medium | ArrayHash TableString |
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