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Re:我的推导过程

Posted by lusd at 2008-11-13 18:26:26 on Problem 1183
In Reply To:我的推导过程 Posted by:stephtan at 2008-09-04 21:39:16
漂亮的推导!
我没想到做代换,我把b,c看成是二次方程的两个根,这时有(b+c)*a=bc-1,枚举(b+c)的值,理论上讲可以出解(我WA掉了,估计是因为精度问题)。

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