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7 Easy6 Medium0 Hard13 total
| No. | Problem | Difficulty | Frequency |
|---|---|---|---|
| 849 | Maximize Distance to Closest Person | Medium | |
| 20 | Valid Parentheses | Easy | |
| 283 | Move Zeroes | Easy | |
| 125 | Valid Palindrome | Easy | |
| 228 | Summary Ranges | Easy | |
| 1493 | Longest Subarray of 1's After Deleting One Element | Medium | |
| 1 | Two Sum | Easy | |
| 3 | Longest Substring Without Repeating Characters | Medium | |
| 165 | Compare Version Numbers | Medium | |
| 56 | Merge Intervals | Medium | |
| 101 | Symmetric Tree | Easy | |
| 121 | Best Time to Buy and Sell Stock | Easy | |
| 567 | Permutation in String | Medium |