> #include<stdio.h>
> void main(){
> 	int x,y,m,n,L;
> 	scanf("%d%d%d%d%d",&x,&y,&m,&n,&L);
> 	if(x!=y && x<2000000000 && y<2000000000 && m>0&&m<2000000000 &&n>0&&n<2000000000 &&L>0&&L<2100000000){
> 		if(m==n) printf("Impossible");
> 		if(m>n){
> 			if(x>y){
> 				if((y+L-x)%(m-n)==0) printf("%d",(y+L-x)/(m-n));
> 				else printf("Impossible");
> 			}
> 			if(x<y){
> 				if((y-x)%(m-n)==0) printf("%d",(y-x)/(m-n));
> 				else printf("Impossible");
> 			}
> 		}
>         if(m<n){
> 			if(x>y){
> 				if((x-y)%(n-m)==0) printf("%d",(x-y)/(n-m));
> 				else printf("Impossible");
> 			}
> 			if(x<y){
> 				if((x+L-y)%(n-m)==0) printf("%d",(x+L-y)/(n-m));
> 				else printf("Impossible");
> 			}
> 		}
> 	}
> }
>