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Re:表示有一步好难理解啊

Posted by hongtrying at 2011-01-08 14:37:33 on Problem 2115
In Reply To:表示有一步好难理解啊 Posted by:cigaring at 2010-10-29 21:02:34
> __int64 MLE(__int64 a,__int64 b,__int64 n)
> {
> 	__int64 x,y,x0;
> 	__int64 d=Extended_Euclid(a,n,x,y);
> 	if(b%d)
> 		return -1;
> 	
> 	x0=x*(b/d)%n+n;
> 	return x0%(n/d);
> 	
> 	
> }
> 
> 
> x0=x*(b/d)%n+n;
> 	return x0%(n/d);
> 就是这一步,不能严格证明,有点晕

算法导论上有详细证明。。。

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