Practice problems across 75+ categories
Practice problems frequently asked at Enumeration • 123 problems | 27 Easy | 61 Medium | 35 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1 | Ambiguous Coordinates | Medium | StringBacktrackingEnumeration |
| 2 | Apply Operations to Make Sum of Array Greater Than or Equal to k | Medium | MathGreedyEnumeration |
| 3 | Check if Move is Legal | Medium | ArrayMatrixEnumeration |
| 4 | Check if Word Can Be Placed In Crossword | Medium | ArrayMatrixEnumeration |
| 5 | Closest Fair Integer | Medium | MathEnumeration |
| 6 | Collecting Chocolates | Medium | ArrayEnumeration |
| 7 | Consecutive Numbers Sum | Hard | MathEnumeration |
| 8 | Coordinate With Maximum Network Quality | Medium | ArrayEnumeration |
| 9 | Count Almost Equal Pairs I | Medium | ArrayHash TableSorting |
| 10 | Count Almost Equal Pairs II | Hard | ArrayHash TableSorting |
| 11 | Count Beautiful Substrings I | Medium | Hash TableMathString |
| 12 | Count Good Triplets | Easy | ArrayEnumeration |
| 13 | Count Increasing Quadruplets | Hard | ArrayDynamic ProgrammingBinary Indexed Tree |
| 14 | Count Lattice Points Inside a Circle | Medium | ArrayHash TableMath |
| 15 | Count Number of Maximum Bitwise-OR Subsets | Medium | ArrayBacktrackingBit Manipulation |
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