Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 256 | Check If Two Expression Trees are Equivalent | Medium | Hash TableTreeDepth-First Search |
| 257 | Check if Word Can Be Placed In Crossword | Medium | ArrayMatrixEnumeration |
| 258 | Check if Word Equals Summation of Two Words | Easy | String |
| 259 | Check Knight Tour Configuration | Medium | ArrayDepth-First SearchBreadth-First Search |
| 260 | Check Whether Two Strings are Almost Equivalent | Easy | Hash TableStringCounting |
| 261 | Checking Existence of Edge Length Limited Paths | Hard | ArrayTwo PointersUnion Find |
| 262 | Checking Existence of Edge Length Limited Paths II | Hard | Union FindGraphMinimum Spanning Tree |
| 263 | Cherry Pickup | Hard | ArrayDynamic ProgrammingMatrix |
| 264 | Choose Edges to Maximize Score in a Tree | Medium | Dynamic ProgrammingTreeDepth-First Search |
| 265 | Choose K Elements With Maximum Sum | Medium | ArraySortingHeap (Priority Queue) |
| 266 | Choose Numbers From Two Arrays in Range | Hard | ArrayDynamic Programming |
| 267 | Chunk Array | Easy | JavaScript |
| 268 | Cinema Seat Allocation | Medium | ArrayHash TableGreedy |
| 269 | Circle and Rectangle Overlapping | Hard | MathGeometry |
| 270 | Circular Array Loop | Medium | ArrayHash TableTwo Pointers |
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