Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 526 | Count Hills and Valleys in an Array | Easy | Array |
| 527 | Count Houses in a Circular Street | Easy | ArrayInteractive |
| 528 | Count Houses in a Circular Street II | Hard | ArrayTwo Pointers |
| 529 | Count Increasing Quadruplets | Hard | ArrayDynamic ProgrammingBinary Indexed Tree |
| 530 | Count Integers in Intervals | Hard | DesignSegment TreeOrdered Set |
| 531 | Count Integers With Even Digit Sum | Easy | MathSimulation |
| 532 | Count Items Matching a Rule | Easy | ArrayString |
| 533 | Count K-Reducible Numbers Less Than N | Hard | MathStringDynamic Programming |
| 534 | Count K-Subsequences of a String With Maximum Beauty | Hard | Hash TableMathString |
| 535 | Count Largest Group | Easy | Hash TableMath |
| 536 | Count Lattice Points Inside a Circle | Medium | ArrayHash TableMath |
| 537 | Count Mentions Per User | Medium | ArrayMathSorting |
| 538 | Count Negative Numbers in a Sorted Matrix | Easy | ArrayBinary SearchMatrix |
| 539 | Count Nice Pairs in an Array | Medium | ArrayHash TableMath |
| 540 | Count Nodes Equal to Average of Subtree | Medium | TreeDepth-First SearchBinary Tree |
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