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Re:我的推导过程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）。 Followed by: Post your reply here: |
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