[newSolution]Who can add 1 more problem of LeetCode 3640

[LetMeFly666]

By Github Actions | 3640.三段式数组 II | 2026-02-04

[1problem1day]

This issue was automatically added to the project.
🕒 Time (Beijing, UTC+8): 2026/2/4 00:47:27
🤖 Triggered by 1problem1day Bot according to action file