#include <stdio.h>
int main()
{
	__int64 x,y,m,n,L;
	bool flag;
	while(scanf("%I64d %I64d %I64d %I64d %I64d",&x,&y,&m,&n,&L)!=EOF)
    {
        flag=false;
	if(x==y||x>=2000000000||y>=2000000000||m<=0||m>=2000000000||n<=0||n>=2000000000||L<=0||L>=2100000000)
        return 0;
	if(m==n)
	{
	    if(x%L!=y%L)
	    {
	        printf("Impossible\n");
	        continue;
	    }
	    else
        {
            printf("1\n");
            continue;
        }

    }
	x=x%L;
	y=y%L;
	__int64 t=0,s,v,r;
	if(m>n)
	{
		v=m-n;
		s=(y-x+L)%L;
		if(s==0)
            s+=L;
		r=s%v;
		while(1)
		{
			if(s%v==0)
				break;
			else if(t>0&&s%v==r)
			{
				flag=true;
				break;
			}
			t++;
			s+=L;
		}
	}
	if(m<n)
	{
		v=n-m;
		s=(x-y+L)%L;
		if(s==0)
            s+=L;
		r=s%v;
		while(1)
		{
			if(s%v==0)
				break;
			else if(t>0&&s%v==r)
			{
				flag=true;
				break;
			}
			t++;
			s+=L;
		}
	}
	if(flag)
		printf("Impossible\n");
	else
		printf("%I64d\n",s/v);
    }
	return 0;
}

• Re:求大神指导为什么一直过不了，数据对了啊 (659) 3233313048 2016-05-23 20:28:57