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5,000+ problems · adaptive hints · AI feedback on every submission.
Solved
248
Attempted
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Acc rate
71%
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| Title | Topic | Difficulty | Acc. | ||
|---|---|---|---|---|---|
| Two Sum | Arrays · Hashing | Easy | 92% | Solve → | |
| Longest Substring Without Repeating Characters | Sliding Window | Medium | 78% | Solve → | |
| Median of Two Sorted Arrays | Binary Search | Hard | 31% | Solve → | |
| Course Schedule II | Graphs · Topo sort | Medium | 64% | Solve → | |
| Word Break | DP · Memoization | Medium | 58% | Solve → | |
| Nth Highest Salary | SQL · Window functions | Easy | 82% | Solve → | |
| Department Top 3 Earners | SQL · Joins + Rank | Medium | 55% | Solve → | |
| LRU Cache | Design · Hashmap + DLL | Hard | 41% | Solve → | |
| Trapping Rain Water | Two pointers · Stack | Hard | 37% | Solve → | |
| Find Duplicate Number | Cycle detection | Medium | 62% | Solve → |