2019-C19

从 Trac 迁移的文章

这是从旧校内 Wiki 迁移的文章，可能存在一些样式问题，您可以向 memset0 反馈。

原文章内容如下：

= Platform =
[https://codeforces.com/group/H7nsMkHC7I/contest/252726 CF Group]

= Ranklist =
[[Image(rc19.png,800px)]]

= Upsolving =

[https://codeforces.com/group/H7nsMkHC7I/contest/252726 CF Group]

= Solution =
See attachment for official solution.

Platform

CF Group

Ranklist

Upsolving

CF Group

Solution

See attachment for official solution.

附加文件