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赞一次AC的涵涵牛

Posted by Thank_you at 2009-11-09 22:01:07
In Reply To:直觉上这道题目会有精度问题... Posted by:chaeyeon at 2009-11-09 21:14:11 
> 求圆的切线如果用了acos之类的话,估计精度会飘的比较远~
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