Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1636 | Running Sum of 1d Array | Easy | ArrayPrefix Sum |
| 1637 | Russian Doll Envelopes | Hard | ArrayBinary SearchDynamic Programming |
| 1638 | Satisfiability of Equality Equations | Medium | ArrayStringUnion Find |
| 1639 | Score After Flipping Matrix | Medium | ArrayGreedyBit Manipulation |
| 1640 | Search a 2D Matrix | Medium | ArrayBinary SearchMatrix |
| 1641 | Search a 2D Matrix II | Medium | ArrayBinary SearchDivide and Conquer |
| 1642 | Search in a Sorted Array of Unknown Size | Medium | ArrayBinary SearchInteractive |
| 1643 | Search in Rotated Sorted Array | Medium | ArrayBinary Search |
| 1644 | Search in Rotated Sorted Array II | Medium | ArrayBinary Search |
| 1645 | Search Insert Position | Easy | ArrayBinary Search |
| 1646 | Search Suggestions System | Medium | ArrayStringBinary Search |
| 1647 | Select Cells in Grid With Maximum Score | Hard | ArrayDynamic ProgrammingBit Manipulation |
| 1648 | Self Crossing | Hard | ArrayMathGeometry |
| 1649 | Sell Diminishing-Valued Colored Balls | Medium | ArrayMathBinary Search |
| 1650 | Selling Pieces of Wood | Hard | ArrayDynamic ProgrammingMemoization |
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