Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1891 | Two Best Non-Overlapping Events | Medium | ArrayBinary SearchDynamic Programming |
| 1892 | Two City Scheduling | Medium | ArrayGreedySorting |
| 1893 | Two Furthest Houses With Different Colors | Easy | ArrayGreedy |
| 1894 | Two Out of Three | Easy | ArrayHash TableBit Manipulation |
| 1895 | Two Sum | Easy | ArrayHash Table |
| 1896 | Two Sum II - Input Array Is Sorted | Medium | ArrayTwo PointersBinary Search |
| 1897 | Two Sum III - Data structure design | Easy | ArrayHash TableTwo Pointers |
| 1898 | Two Sum Less Than K | Easy | ArrayTwo PointersBinary Search |
| 1899 | Type of Triangle | Easy | ArrayMathSorting |
| 1900 | Uncrossed Lines | Medium | ArrayDynamic Programming |
| 1901 | Unique 3-Digit Even Numbers | Easy | ArrayHash TableRecursion |
| 1902 | Unique Email Addresses | Easy | ArrayHash TableString |
| 1903 | Unique Morse Code Words | Easy | ArrayHash TableString |
| 1904 | Unique Number of Occurrences | Easy | ArrayHash Table |
| 1905 | Unique Paths II | Medium | ArrayDynamic ProgrammingMatrix |
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