Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3091 | Subarray Sum Equals K | Medium | ArrayHash TablePrefix Sum |
| 3092 | Subarray Sums Divisible by K | Medium | ArrayHash TablePrefix Sum |
| 3093 | Subarray With Elements Greater Than Varying Threshold | Hard | ArrayStackUnion Find |
| 3094 | Subarrays Distinct Element Sum of Squares I | Easy | ArrayHash Table |
| 3095 | Subarrays Distinct Element Sum of Squares II | Hard | ArrayDynamic ProgrammingBinary Indexed Tree |
| 3096 | Subarrays with K Different Integers | Hard | ArrayHash TableSliding Window |
| 3097 | Subdomain Visit Count | Medium | ArrayHash TableString |
| 3098 | Subrectangle Queries | Medium | ArrayDesignMatrix |
| 3099 | Subsequence of Size K With the Largest Even Sum | Medium | ArrayGreedySorting |
| 3100 | Subsequence With the Minimum Score | Hard | Two PointersStringBinary Search |
| 3101 | Subsequences with a Unique Middle Mode I | Hard | ArrayHash TableMath |
| 3102 | Subsequences with a Unique Middle Mode II | Hard | ArrayHash TableMath |
| 3103 | Subsets | Medium | ArrayBacktrackingBit Manipulation |
| 3104 | Subsets II | Medium | ArrayBacktrackingBit Manipulation |
| 3105 | Substring Matching Pattern | Easy | StringString Matching |
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