2019-C20

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 =
[http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=001531 Opentrains]

= Ranklist =
[[Image(rc20.png,800px)]]

= Upsolving =

[http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=001531 Opentrains]

= Solution =
See attachment for official solution.

Platform

Opentrains

Ranklist

Upsolving

Opentrains

Solution

See attachment for official solution.

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