#include<iostream>
using namespace std;
int main()
{
	__int64 x,y,m,n,l;
	scanf("%I64d %I64d %I64d %I64d %I64d",&x,&y,&m,&n,&l);
	x = x % l;
	y = y % l;
	__int64 xs = x ;
	__int64 ys = y ;
	__int64 i = 0;
	bool flag = true;
	while(true)
	{
		if( xs == ys)	break;	//走到相同地的地方了，退出
		xs = (xs + m) % l;
		ys = (ys + n) % l;
		i++;
		if(xs == x && ys == y)	//回到开始位置，退出
		{
			flag = false;
			break;	
		}
	}
	if(flag)
		printf("%I64d\n",i);
	else
		printf("Impossible\n");
	return 0;
}

• Re:超时错误，求高人指点，我是一步一个脚印跳的呢.测试数据都通过 (596) full_panic 2010-07-08 17:22:29