Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 151 | Check if There is a Valid Path in a Grid | Medium | ArrayDepth-First SearchBreadth-First Search |
| 152 | Check If Two String Arrays are Equivalent | Easy | ArrayString |
| 153 | Check if Word Can Be Placed In Crossword | Medium | ArrayMatrixEnumeration |
| 154 | Check Knight Tour Configuration | Medium | ArrayDepth-First SearchBreadth-First Search |
| 155 | Checking Existence of Edge Length Limited Paths | Hard | ArrayTwo PointersUnion Find |
| 156 | Cherry Pickup | Hard | ArrayDynamic ProgrammingMatrix |
| 157 | Cherry Pickup II | Hard | ArrayDynamic ProgrammingMatrix |
| 158 | Choose K Elements With Maximum Sum | Medium | ArraySortingHeap (Priority Queue) |
| 159 | Choose Numbers From Two Arrays in Range | Hard | ArrayDynamic Programming |
| 160 | Cinema Seat Allocation | Medium | ArrayHash TableGreedy |
| 161 | Circular Array Loop | Medium | ArrayHash TableTwo Pointers |
| 162 | Closest Dessert Cost | Medium | ArrayDynamic ProgrammingBacktracking |
| 163 | Closest Equal Element Queries | Medium | ArrayHash TableBinary Search |
| 164 | Closest Node to Path in Tree | Hard | ArrayTreeDepth-First Search |
| 165 | Closest Nodes Queries in a Binary Search Tree | Medium | ArrayBinary SearchTree |
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