Practice problems across 75+ categories
Practice problems frequently asked at Enumeration • 123 problems | 27 Easy | 61 Medium | 35 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Count Primes | Medium | ArrayMathEnumeration |
| 17 | Count Special Quadruplets | Easy | ArrayHash TableEnumeration |
| 18 | Count Special Subsequences | Medium | ArrayHash TableMath |
| 19 | Count Square Sum Triples | Easy | MathEnumeration |
| 20 | Count Substrings That Differ by One Character | Medium | Hash TableStringDynamic Programming |
| 21 | Count Subtrees With Max Distance Between Cities | Hard | Dynamic ProgrammingBit ManipulationTree |
| 22 | Count Symmetric Integers | Easy | MathEnumeration |
| 23 | Count the Number of Incremovable Subarrays I | Easy | ArrayTwo PointersBinary Search |
| 24 | Count the Number of Substrings With Dominant Ones | Medium | StringEnumeration |
| 25 | Create Components With Same Value | Hard | ArrayMathTree |
| 26 | Detect Pattern of Length M Repeated K or More Times | Easy | ArrayEnumeration |
| 27 | Distribute Candies Among Children I | Easy | MathCombinatoricsEnumeration |
| 28 | Distribute Candies Among Children II | Medium | MathCombinatoricsEnumeration |
| 29 | Divide an Array Into Subarrays With Minimum Cost I | Easy | ArraySortingEnumeration |
| 30 | Equal Sum Grid Partition I | Medium | ArrayMatrixEnumeration |
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