Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3106 | Subrectangle Queries | Medium | ArrayDesignMatrix |
| 3107 | Subsequence of Size K With the Largest Even Sum | Medium | ArrayGreedySorting |
| 3108 | Subsequence With the Minimum Score | Hard | Two PointersStringBinary Search |
| 3109 | Subsequences with a Unique Middle Mode I | Hard | ArrayHash TableMath |
| 3110 | Subsequences with a Unique Middle Mode II | Hard | ArrayHash TableMath |
| 3111 | Subsets | Medium | ArrayBacktrackingBit Manipulation |
| 3112 | Subsets II | Medium | ArrayBacktrackingBit Manipulation |
| 3113 | Substring Matching Pattern | Easy | StringString Matching |
| 3114 | Substring with Concatenation of All Words | Hard | Hash TableStringSliding Window |
| 3115 | Substring With Largest Variance | Hard | ArrayDynamic Programming |
| 3116 | Substring XOR Queries | Medium | ArrayHash TableString |
| 3117 | Substrings of Size Three with Distinct Characters | Easy | Hash TableStringSliding Window |
| 3118 | Substrings That Begin and End With the Same Letter | Medium | Hash TableMathString |
| 3119 | Subtract the Product and Sum of Digits of an Integer | Easy | Math |
| 3120 | Subtree Inversion Sum | Hard | ArrayDynamic ProgrammingTree |
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