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懂了,不要理我

Posted by Loger at 2004-05-15 23:20:17 on Problem 1662
In Reply To:不懂。。。。 Posted by:Loger at 2004-05-15 23:19:13
> 对于4个硬币 设为a,b,c,d 
> 0为正面 ,1为反面
> a0,b0,c,0,d0
> 作一次变化后得
> d1,b1,a0,,c0 (应该没错吧)
> 对于b硬币,它的位置不变
> 那要得到b0不就要经过偶数次变换,那为什么答案是11 ????
> 不懂。。。。。。。。。。。。。。

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