Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 661 | Disconnect Path in a Binary Matrix by at Most One Flip | Medium | ArrayDynamic ProgrammingDepth-First Search |
| 662 | Display Table of Food Orders in a Restaurant | Medium | ArrayHash TableString |
| 663 | Distance Between Bus Stops | Easy | Array |
| 664 | Distance to a Cycle in Undirected Graph | Hard | Depth-First SearchBreadth-First SearchUnion Find |
| 665 | Distant Barcodes | Medium | ArrayHash TableGreedy |
| 666 | Distinct Echo Substrings | Hard | StringTrieRolling Hash |
| 667 | Distinct Numbers in Each Subarray | Medium | ArrayHash TableSliding Window |
| 668 | Distinct Prime Factors of Product of Array | Medium | ArrayHash TableMath |
| 669 | Distinct Subsequences II | Hard | StringDynamic Programming |
| 670 | Distribute Candies | Easy | ArrayHash Table |
| 671 | Distribute Candies Among Children I | Easy | MathCombinatoricsEnumeration |
| 672 | Distribute Candies Among Children II | Medium | MathCombinatoricsEnumeration |
| 673 | Distribute Candies Among Children III | Hard | MathCombinatorics |
| 674 | Distribute Coins in Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
| 675 | Distribute Elements Into Two Arrays I | Easy | ArraySimulation |
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