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1061问题求救,不知道wrong在何处。第一次提交可能规则不懂,望大牛们指教。。。

Posted by everestsun at 2006-05-12 16:48:20
#include <iostream.h>
long SkipTimes(long x,long y,long m,long n,long L);
void main()
{
	long x,y,m,n,L;	
	cin>>x>>y>>m>>n>>L;
	if(x==y)
	{
		cout<<"X != Y"<<endl;
		return;
	}
	if(m<0||n<0)
	{
		cout<<"M or N < 0"<<endl;
		return;
	}
	if(L<0)
	{
		cout<<"L < 0"<<endl;
	}
	long T = SkipTimes(x,y,m,n,L);
	if(T == -1)
		cout<<"Impossible"<<endl;
	else
		cout<<T<<endl;
}

long SkipTimes(long x,long y,long m,long n,long L)
{
	for(long i=1;;i++)
	{
		if( ((x+m*i)%L)==((y+n*i)%L) )
			return i;
		else if(i > 4*L*L)
			return -1;
		else
			continue;
	}
}

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