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不要去求圆心,直接用外接圆半径公式就够了。如果嫌sqrt太慢,可以先N^2预处理所有线段长度。

Posted by alpc62 at 2008-05-06 18:59:36 on Problem 3587
In Reply To:不能随便些啊 Posted by:zgw at 2008-05-06 17:40:30


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