trick2

jys posted @ Jul 19, 2014 05:47:02 PM in 未分类 , 861 阅读

给定字符串,判断L是否为其循环节:L-前缀与L-后缀比较即可

如果需要枚举某个数的因数使得该因数满足某一条件,而且该条件如果a不满足那么任意d|a均不满足

可以一个个质因数分解过来搞

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