Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2086 | Number of Operations to Make Network Connected | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 2087 | Number of Pairs of Interchangeable Rectangles | Medium | ArrayHash TableMath |
| 2088 | Number of Pairs of Strings With Concatenation Equal to Target | Medium | ArrayHash TableString |
| 2089 | Number of Pairs Satisfying Inequality | Hard | ArrayBinary SearchDivide and Conquer |
| 2090 | Number of Paths with Max Score | Hard | ArrayDynamic ProgrammingMatrix |
| 2091 | Number of People Aware of a Secret | Medium | Dynamic ProgrammingQueueSimulation |
| 2092 | Number of People That Can Be Seen in a Grid | Medium | ArrayStackMatrix |
| 2093 | Number of Possible Sets of Closing Branches | Hard | Bit ManipulationGraphHeap (Priority Queue) |
| 2094 | Number of Provinces | Unknown | Depth-First SearchBreadth-First SearchUnion Find |
| 2095 | Number of Recent Calls | Easy | DesignQueueData Stream |
| 2096 | Number Of Rectangles That Can Form The Largest Square | Easy | Array |
| 2097 | Number of Restricted Paths From First to Last Node | Medium | Dynamic ProgrammingGraphTopological Sort |
| 2098 | Number of Same-End Substrings | Medium | ArrayHash TableString |
| 2099 | Number of Self-Divisible Permutations | Medium | ArrayMathDynamic Programming |
| 2100 | Number of Sets of K Non-Overlapping Line Segments | Medium | MathDynamic ProgrammingCombinatorics |
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