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直接加了个源点当根求最小树形图水过了。。。。听说有n^2的。。。。。

Posted by DieIng at 2009-09-20 19:32:57
In Reply To:shanghai C题怎么做？最小树形图zhu_liu算法？ Posted by:Xiaonei at 2009-09-20 17:01:04 
> rt
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