Practice problems across 75+ categories
Practice problems frequently asked at Math • 596 problems | 150 Easy | 283 Medium | 161 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 106 | Count Number of Bad Pairs | Medium | ArrayHash TableMath |
| 107 | Count Number of Balanced Permutations | Hard | MathStringDynamic Programming |
| 108 | Count Number of Distinct Integers After Reverse Operations | Medium | ArrayHash TableMath |
| 109 | Count Number of Homogenous Substrings | Medium | MathString |
| 110 | Count Number of Nice Subarrays | Medium | ArrayHash TableMath |
| 111 | Count Number of Texts | Medium | Hash TableMathString |
| 112 | Count Numbers with Non-Decreasing Digits | Unknown | MathStringDynamic Programming |
| 113 | Count Numbers with Unique Digits | Medium | MathDynamic ProgrammingBacktracking |
| 114 | Count Numbers With Unique Digits II | Easy | Hash TableMathDynamic Programming |
| 115 | Count Odd Numbers in an Interval Range | Easy | Math |
| 116 | Count of Integers | Hard | MathStringDynamic Programming |
| 117 | Count of Matches in Tournament | Easy | MathSimulation |
| 118 | Count Operations to Obtain Zero | Easy | MathSimulation |
| 119 | Count Partitions with Even Sum Difference | Easy | ArrayMathPrefix Sum |
| 120 | Count Prime-Gap Balanced Subarrays | Medium | ArrayMathQueue |
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