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可以ac，比赛的时候我就是这样过的

Posted by mmdcat at 2007-05-05 09:45:37 on Problem 3228
In Reply To:这道题用最大流+二分枚举答案不对么？一直WA。谢谢 Posted by:Roa at 2007-05-04 17:35:16 
> rt，谢谢
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