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generating function很慢很慢……

Posted by frkstyc at 2005-09-02 17:36:01 on Problem 2229
In Reply To:这道题用母函数可以吗? 母函数若干个多项式相乘是直接模拟? Posted by:Lucifer at 2005-09-02 17:34:13 
> 母函数和DP比较哪个好些?
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