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呃……这个题，大家是怎么求(1+p+p^2+...+p^q)%9901的？

Posted by Jet605 at 2006-03-09 20:49:18 on Problem 1845 
我最弱智的找循环节……因为不知道(p^(m+1)-1)/(p-1)模的时候分母怎么搞:(
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