Practice problems across 75+ categories
Practice problems frequently asked at Math • 596 problems | 150 Easy | 283 Medium | 161 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 76 | Confusing Number II | Hard | MathBacktracking |
| 77 | Consecutive Numbers Sum | Hard | MathEnumeration |
| 78 | Construct the Longest New String | Medium | MathDynamic ProgrammingGreedy |
| 79 | Construct the Rectangle | Easy | Math |
| 80 | Continuous Subarray Sum | Medium | ArrayHash TableMath |
| 81 | Convert a Number to Hexadecimal | Easy | MathStringBit Manipulation |
| 82 | Convert Binary Number in a Linked List to Integer | Easy | Linked ListMath |
| 83 | Convert Date to Binary | Easy | MathString |
| 84 | Convert Integer to the Sum of Two No-Zero Integers | Easy | Math |
| 85 | Convert the Temperature | Easy | Math |
| 86 | Convert to Base -2 | Unknown | Math |
| 87 | Convex Polygon | Medium | ArrayMathGeometry |
| 88 | Count All Valid Pickup and Delivery Options | Hard | MathDynamic ProgrammingCombinatorics |
| 89 | Count Alternating Subarrays | Medium | ArrayMath |
| 90 | Count Anagrams | Hard | Hash TableMathString |
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