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不知道你的500000怎么出来的了,感觉太小

Posted by frkstyc at 2006-01-09 20:10:14 on Problem 2720
In Reply To:可以证明 Posted by:zymx at 2006-01-09 19:46:39
> 最大的cycle是500000,对所有n<=7。
> 而且所有其他的周期都是500000的约数。
> 
> 我存了一个表,700个元素,对所有的b、n,给出这个周期在第几个元素开始.
> (不打表,直接计算的话,需要至少500ms的时间)
> 然后就是100*100*log(500000)的模运算,加上记忆化,就这么过了

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