Practice problems across 75+ categories
Practice problems frequently asked at Sorting • 464 problems | 89 Easy | 273 Medium | 101 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 451 | The Skyline Problem | Hard | ArrayDivide and ConquerBinary Indexed Tree |
| 452 | Third Maximum Number | Easy | ArraySorting |
| 453 | Time Slot Scheduler | Medium | ArraysArraySorting |
| 454 | Top K Frequent Elements | Medium | ArrayHash TableDivide and Conquer |
| 455 | Top K Frequent Words | Medium | ArrayHash TableString |
| 456 | Transform Array by Parity | Easy | ArraySortingCounting |
| 457 | Tweet Counts Per Frequency | Medium | Hash TableStringBinary Search |
| 458 | Two Best Non-Overlapping Events | Medium | ArrayBinary SearchDynamic Programming |
| 459 | Two City Scheduling | Medium | ArrayGreedySorting |
| 460 | Two Sum Less Than K | Easy | ArrayTwo PointersBinary Search |
| 461 | Type of Triangle | Easy | ArrayMathSorting |
| 462 | Valid Anagram | Easy | Hash TableStringSorting |
| 463 | Valid Triangle Number | Medium | ArrayTwo PointersBinary Search |
| 464 | Vertical Order Traversal of a Binary Tree | Hard | Hash TableTreeDepth-First Search |
| 465 | Weighted Activity Selection | Hard | Advanced DPDPSorting |
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