Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 436 | Find Right Interval | Medium | ArrayBinary SearchSorting |
| 437 | Path Sum III | Medium | TreeDepth-First SearchBinary Tree |
| 438 | Find All Anagrams in a String | Medium | Hash TableStringSliding Window |
| 439 | Ternary Expression Parser | Medium | StringStackRecursion |
| 440 | K-th Smallest in Lexicographical Order | Hard | Trie |
| 441 | Arranging Coins | Easy | MathBinary Search |
| 442 | Add Two Numbers II | Medium | Linked ListMathStack |
| 442 | Find All Duplicates in an Array | Medium | ArrayHash TableSorting |
| 443 | String Compression | Medium | Two PointersString |
| 444 | Sequence Reconstruction | Medium | ArrayGraphTopological Sort |
| 446 | Arithmetic Slices II - Subsequence | Hard | ArrayDynamic Programming |
| 447 | Number of Boomerangs | Medium | ArrayHash TableMath |
| 448 | Find All Numbers Disappeared in an Array | Easy | ArrayHash Table |
| 449 | Serialize and Deserialize BST | Medium | StringTreeDepth-First Search |
| 450 | Delete Node in a BST | Medium | TreeBinary Search TreeBinary Tree |
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