Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 166 | Cherry Pickup II | Hard | ArrayDynamic ProgrammingMatrix |
| 167 | Choose K Elements With Maximum Sum | Medium | ArraySortingHeap (Priority Queue) |
| 168 | Choose Numbers From Two Arrays in Range | Hard | ArrayDynamic Programming |
| 169 | Cinema Seat Allocation | Medium | ArrayHash TableGreedy |
| 170 | Circular Array Loop | Medium | ArrayHash TableTwo Pointers |
| 171 | Circular Buffer | Easy | Data StructuresArrayModulo |
| 172 | Closest Dessert Cost | Medium | ArrayDynamic ProgrammingBacktracking |
| 173 | Closest Equal Element Queries | Medium | ArrayHash TableBinary Search |
| 174 | Closest Node to Path in Tree | Hard | ArrayTreeDepth-First Search |
| 175 | Closest Nodes Queries in a Binary Search Tree | Medium | ArrayBinary SearchTree |
| 176 | Closest Room | Hard | ArrayBinary SearchSorting |
| 177 | Closest Subsequence Sum | Hard | ArrayTwo PointersDynamic Programming |
| 178 | Coin Change | Medium | ArrayDynamic ProgrammingBreadth-First Search |
| 179 | Coin Change II | Medium | ArrayDynamic Programming |
| 180 | Coin Path | Hard | ArrayDynamic Programming |
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