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换一种做法过了,不过还是没搞明白为什么用最大流不对。

Posted by Roa at 2007-05-04 19:07:06 on Problem 3228
In Reply To:感觉用最大流也可以啊,为什么错呢? Posted by:Roa at 2007-05-04 17:51:53


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