[newSolution]Who can add 1 more problem of LeetCode 2213

[LetMeFly666]

By Github Actions | 2213.由单个字符重复的最长子字符串 | 2026-08-13

[1problem1day]

This issue was automatically added to the project.
🕒 Time (Beijing, UTC+8): 2026/8/13 00:52:38
🤖 Triggered by 1problem1day Bot according to action file