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题意:由n头牛,不同的听力值v,当i,j想要通话时,需要max(v(i),v(j))*(dist[i]-dist[j])的volume,问这n*(n-1)/2对牛总共的volume时多少。

Posted by 407811696 at 2010-11-19 16:49:00 on Problem 1990


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