Practice problems across 75+ categories
Practice problems frequently asked at Enumeration • 123 problems | 27 Easy | 61 Medium | 35 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 31 | Equal Sum Grid Partition II | Hard | ArrayHash TableMatrix |
| 32 | Find Maximum Area of a Triangle | Medium | ArrayHash TableMath |
| 33 | Find the Count of Good Integers | Hard | Hash TableMathCombinatorics |
| 34 | Find the Integer Added to Array II | Medium | ArrayTwo PointersSorting |
| 35 | Find the Lexicographically Largest String From the Box I | Medium | Two PointersStringEnumeration |
| 36 | Find the Maximum Number of Elements in Subset | Medium | ArrayHash TableEnumeration |
| 37 | Find the Minimum Area to Cover All Ones II | Hard | ArrayMatrixEnumeration |
| 38 | Find the Number of Ways to Place People I | Medium | ArrayMathGeometry |
| 39 | Find the Number of Ways to Place People II | Hard | ArrayMathGeometry |
| 40 | Find the Peaks | Easy | ArrayEnumeration |
| 41 | Finding 3-Digit Even Numbers | Easy | ArrayHash TableRecursion |
| 42 | Form Smallest Number From Two Digit Arrays | Easy | ArrayHash TableEnumeration |
| 43 | Frequencies of Shortest Supersequences | Hard | ArrayStringBit Manipulation |
| 44 | Greatest English Letter in Upper and Lower Case | Easy | Hash TableStringEnumeration |
| 45 | Happy Students | Medium | ArraySortingEnumeration |
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