> #include<stdio.h>
> void main()
> {
>      unsigned long int i,x,y,m,n,l;
> 	 scanf("%u%u%u%u%u",&x,&y,&m,&n,&l);	
> 	 for(i=1;i<l;)
> 	 {
> 		x=(x+m)%l;
>      	y=(y+n)%l;
>         if(x==y)
> 		{   
> 			  printf("%u\n",i);
> 		      break;
> 		}
> 		else
> 		{
> 			i++;
> 			continue;
> 		}
> 	}
> 	if(i==l)
> 	{
> 		printf("Impossible\n");
> 	}
> }