Open Maple-pro opened 2 years ago
https://blog.maples31.com/blog/2021/03/13/CF%20661%20(Div.3)/
Codeforces Round 661, div.3
https://blog.maples31.com/blog/2021/03/13/CF%20661%20(Div.3)/
Codeforces Round 661, div.3