Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3091 | Strong Friendship | Medium | Database |
| 3092 | Strong Password Checker | Hard | StringGreedyHeap (Priority Queue) |
| 3093 | Strong Password Checker II | Easy | String |
| 3094 | Student Attendance Record I | Easy | String |
| 3095 | Student Attendance Record II | Hard | Dynamic Programming |
| 3096 | Students and Examinations | Easy | Database |
| 3097 | Students With Invalid Departments | Easy | Database |
| 3098 | Subarray Product Less Than K | Medium | ArrayBinary SearchSliding Window |
| 3099 | Subarray Sum Equals K | Medium | ArrayHash TablePrefix Sum |
| 3100 | Subarray Sums Divisible by K | Medium | ArrayHash TablePrefix Sum |
| 3101 | Subarray With Elements Greater Than Varying Threshold | Hard | ArrayStackUnion Find |
| 3102 | Subarrays Distinct Element Sum of Squares I | Easy | ArrayHash Table |
| 3103 | Subarrays Distinct Element Sum of Squares II | Hard | ArrayDynamic ProgrammingBinary Indexed Tree |
| 3104 | Subarrays with K Different Integers | Hard | ArrayHash TableSliding Window |
| 3105 | Subdomain Visit Count | Medium | ArrayHash TableString |
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