[newSolution]Who can add 1 more problem of LeetCode 3756 + docs/aria2命令行下载工具

[LetMeFly666]

By Github Actions | 3756.连接非零数字并乘以其数字和 II | 2026-07-08

[1problem1day]

This issue was automatically added to the project.
🕒 Time (Beijing, UTC+8): 2026/7/8 01:55:04
🤖 Triggered by 1problem1day Bot according to action file

[LetMeFly666]

hello #1684 you are not alone now(/again). -- From MacOS

[1problem1day]

Set the project status to In Progress based on the solving label.
🕒 Time (Beijing, UTC+8): 2026/7/8 13:35:56
🤖 Triggered by 1problem1day Bot according to action file

[LetMeFly666]

3756.TODO rm 3756.tmp.cpp