Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 571 | Decode XORed Array | Easy | ArrayBit Manipulation |
| 572 | Decode XORed Permutation | Medium | ArrayBit Manipulation |
| 573 | Decoded String at Index | Medium | StringStack |
| 574 | Decompress Run-Length Encoded List | Easy | Array |
| 575 | Decremental String Concatenation | Medium | ArrayStringDynamic Programming |
| 576 | Decrypt String from Alphabet to Integer Mapping | Easy | String |
| 577 | Deep Merge of Two Objects | Medium | JavaScript |
| 578 | Deep Object Filter | Medium | Database |
| 579 | Deepest Leaves Sum | Medium | TreeDepth-First SearchBreadth-First Search |
| 580 | Defanging an IP Address | Easy | String |
| 581 | Defuse the Bomb | Easy | ArraySliding Window |
| 582 | Degree of an Array | Easy | ArrayHash Table |
| 583 | Delay the Resolution of Each Promise | Medium | Database |
| 584 | Delete and Earn | Medium | ArrayHash TableDynamic Programming |
| 585 | Delete Characters to Make Fancy String | Easy | String |
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