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Re:我来给个说明

Posted by huaixiaozi at 2008-04-01 21:39:11 on Problem 2663
In Reply To:我来给个说明 Posted by:zyz at 2007-07-03 20:35:32
> 3*x+2*y
> 3的情况:两排切出来,是3; 乘以(length-2)*3组成的总数
> 2的情况:
>    4排切出来,是2;乘以(length-4)*3组成的总数
>    6排切出来,是2;乘以(length-6)*3组成的总数
>    ...

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