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把距离公式整理整理，标程是一个n^2的枚举，然后是贪心

Posted by hawk at 2004-11-19 23:39:16 on Problem 2076
In Reply To:哪位能指点一下这道题目的方法？我想不出低于o(n^4)的。 Posted by:contest at 2004-11-19 23:20:20 
> rt.
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