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pigeon hole

Posted by frkstyc at 2005-06-29 22:30:59 on Problem 2438
In Reply To:注意这个条件吧,任意u,v,d(u)+d(v)>=n...而且...不是叫"容斥"吧? Posted by:ArXoR at 2005-06-29 22:29:46


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