> #include "stdafx.h"
> 
> 
> void main()
> {
> long x,y,m,n,l;
> cin>>x>>y>>m>>n>>l;
> int a,e,f,d=1;
> if(m>n)
> {
> 	if(x<y)
> 		a=y-x;
> 	else a=l+x-y;
> }
> else
> {
> 	if(x<y)
> 		a=l+x-y;
> 	else a=y-x;
> }
> int c,b=1;
> while(b<=x)
> {
> 	if(x/b==int(x/b))
> 	{
> 		if(y/b==int(y/b))
> 			c=b;
> 	}
> 	else
> 	{
> 	}
>    	b++;
> }
> if(a/c==int(a/c))
> {
> 	while((e-f)/l!=int((e-f)/l))
> {
> 	e=m*d;f=y-x+n*d;
> 		d++;
> 	}
> 	cout<<"需跳"<<d<<"步";
> }
> else
> {
> 	cout<<"impossible";
> }
> }