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Re:请问这题如何做？

Posted by HoneyGiveMeAHug at 2009-04-05 17:49:20 on Problem 3723
In Reply To:请问这题如何做？ Posted by:more at 2009-04-05 17:45:40 
> rt
题意可以表述为选出一些边，使得权和最大，要求不存在环。按着这个想应该很容易想到了
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