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ans = (2*b -x1 - x2)%b

Posted by majia5 at 2009-10-24 17:07:29
In Reply To:请问今天第三题怎么搞 Posted by:twilight at 2009-10-24 13:55:26
> x^3 ≡ a (mod b)
> 保证有3个不同的根,告诉你2个根,a,b,求第三个

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