Problem Catalog
| # | Title | Difficulty | Primary Pattern | |
|---|---|---|---|---|
| 3 | Longest Substring Without Repeating Characters | Medium | Sliding Window | Edit |
| 42 | Trapping Rain Water | Hard | Two Pointers | Edit |
| 55 | Jump Game | Medium | Greedy | Edit |
| 56 | Merge Intervals | Medium | Intervals | Edit |
| 75 | Sort Colors | Medium | Two Pointers | Edit |
| 146 | LRU Cache | Medium | Linked List | Edit |
| 200 | Number of Islands | Medium | DFS | Edit |
| 207 | Course Schedule | Medium | Topological Sort | Edit |
| 295 | Find Median from Data Stream | Hard | Heap | Edit |
| 300 | Longest Increasing Subsequence | Medium | 1D DP | Edit |