QOJ.ac

QOJ

Type: General Discussion

Status: Open

Posted by: hxy_hxy

Posted at: 2025-12-18 22:53:30

Last updated: 2025-12-18 22:55:42

Back to Problem

https://codeforces.com/blog/entry/149299

出题人题解也没有证明自己的题目结论。

hxy_hxy