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5 Easy3 Medium0 Hard8 total
| No. | Problem | Difficulty | Frequency |
|---|---|---|---|
| 2264 | Largest 3-Same-Digit Number in String | Easy | |
| 3662 | Filter Characters by Frequency | Easy | |
| 20 | Valid Parentheses | Easy | |
| 14 | Longest Common Prefix | Easy | |
| 5 | Longest Palindromic Substring | Medium | |
| 121 | Best Time to Buy and Sell Stock | Easy | |
| 560 | Subarray Sum Equals K | Medium | |
| 1823 | Find the Winner of the Circular Game | Medium |