Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1891 | The Maze | Medium | ArrayDepth-First SearchBreadth-First Search |
| 1892 | The Maze II | Medium | ArrayDepth-First SearchBreadth-First Search |
| 1893 | The Maze III | Hard | ArrayStringDepth-First Search |
| 1894 | The Number of Beautiful Subsets | Medium | ArrayHash TableMath |
| 1895 | The Number of Good Subsets | Hard | ArrayHash TableMath |
| 1896 | The Number of the Smallest Unoccupied Chair | Medium | ArrayHash TableHeap (Priority Queue) |
| 1897 | The Number of Ways to Make the Sum | Medium | ArrayDynamic Programming |
| 1898 | The Number of Weak Characters in the Game | Medium | ArrayStackGreedy |
| 1899 | The Score of Students Solving Math Expression | Hard | ArrayHash TableMath |
| 1900 | The Skyline Problem | Hard | ArrayDivide and ConquerBinary Indexed Tree |
| 1901 | The Time When the Network Becomes Idle | Medium | ArrayBreadth-First SearchGraph |
| 1902 | The Two Sneaky Numbers of Digitville | Easy | ArrayHash TableMath |
| 1903 | The Wording Game | Hard | ArrayMathTwo Pointers |
| 1904 | Third Maximum Number | Easy | ArraySorting |
| 1905 | Three Consecutive Odds | Easy | Array |
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