Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 226 | Count Distinct Numbers on Board | Easy | ArrayHash TableMath |
| 227 | Count Elements With Maximum Frequency | Easy | ArrayHash TableCounting |
| 228 | Count Elements With Strictly Smaller and Greater Elements | Easy | ArraySortingCounting |
| 229 | Count Equal and Divisible Pairs in an Array | Easy | Array |
| 230 | Count Fertile Pyramids in a Land | Hard | ArrayDynamic ProgrammingMatrix |
| 231 | Count Good Meals | Medium | ArrayHash Table |
| 232 | Count Good Triplets | Easy | ArrayEnumeration |
| 233 | Count Good Triplets in an Array | Hard | ArrayBinary SearchDivide and Conquer |
| 234 | Count Hills and Valleys in an Array | Easy | Array |
| 235 | Count Houses in a Circular Street | Easy | ArrayInteractive |
| 236 | Count Houses in a Circular Street II | Hard | ArrayTwo Pointers |
| 237 | Count Increasing Quadruplets | Hard | ArrayDynamic ProgrammingBinary Indexed Tree |
| 238 | Count Items Matching a Rule | Easy | ArrayString |
| 239 | Count Lattice Points Inside a Circle | Medium | ArrayHash TableMath |
| 240 | Count Mentions Per User | Medium | ArrayMathSorting |
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