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Re:不知道你的500000怎么出来的了，感觉太小

Posted by zymx at 2006-01-09 20:15:13 on Problem 2720
In Reply To: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 
50w有些trick，500w很显然：

10^7=1000w，对任何自然数b, 有b^n%2==b%2，所以，最大循环节<=500w。
这个值也足够过bt的数据。
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