Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 91 | Count Good Meals | Medium | ArrayHash Table |
| 92 | Count K-Subsequences of a String With Maximum Beauty | Hard | Hash TableMathString |
| 93 | Count Largest Group | Easy | Hash TableMath |
| 94 | Count Lattice Points Inside a Circle | Medium | ArrayHash TableMath |
| 95 | Count Nice Pairs in an Array | Medium | ArrayHash TableMath |
| 96 | Count Number of Bad Pairs | Medium | ArrayHash TableMath |
| 97 | Count Number of Distinct Integers After Reverse Operations | Medium | ArrayHash TableMath |
| 98 | Count Number of Nice Subarrays | Medium | ArrayHash TableMath |
| 99 | Count Number of Pairs With Absolute Difference K | Easy | ArrayHash TableCounting |
| 100 | Count Number of Possible Root Nodes | Hard | ArrayHash TableDynamic Programming |
| 101 | Count Number of Rectangles Containing Each Point | Medium | ArrayHash TableBinary Search |
| 102 | Count Number of Texts | Medium | Hash TableMathString |
| 103 | Count Numbers With Unique Digits II | Easy | Hash TableMathDynamic Programming |
| 104 | Count Odd Letters from Number | Easy | Hash TableStringSimulation |
| 105 | Count of Interesting Subarrays | Medium | ArrayHash TablePrefix Sum |
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