2019-C09
从 Trac 迁移的文章
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原文章内容如下：
= Platform =
[http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=001506 Opentrains]
= Ranklist =
[http://opentrains.snarknews.info/~ejudge/showres.cgi?data=results_zju_1506.dat Opentrains]
= Upsolving =
[http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=001506 Opentrains]
= Solution =
[https://www.cnblogs.com/clrs97/p/7745589.html Claris] [[br]]
[http://clatisus.com/Petrozavodsk%20Summer-2017.%20Warsaw%20U%20Contest Nonsense Time (Problem E)] [[br]]
[http://shooter.is-programmer.com/posts/214258.html La Mala Hora]