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12 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 849. Maximize Distance to Closest Person | Medium | 100% | TopicsArray |
| 20. Valid Parentheses | Easy | 84% | TopicsStringStackBracket Sequences |
| 1. Two Sum | Easy | 84% | TopicsArrayHash Table |
| 283. Move Zeroes | Easy | 77.4% | TopicsArrayTwo Pointers |
| 228. Summary Ranges | Easy | 77.4% | TopicsArray |
| 1493. Longest Subarray of 1's After Deleting One Element | Medium | 77.4% | TopicsArrayDynamic ProgrammingSliding Window |
| 125. Valid Palindrome | Easy | 68% | TopicsTwo PointersString |
| 3. Longest Substring Without Repeating Characters | Medium | 68% | TopicsHash TableStringSliding Window |
| 165. Compare Version Numbers | Medium | 68% | TopicsTwo PointersString |
| 56. Merge Intervals | Medium | 68% | TopicsArraySortingQuicksort |
| 101. Symmetric Tree | Easy | 68% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| 567. Permutation in String | Medium | 68% | TopicsHash TableTwo PointersStringSliding Window |
