> #include<iostream>
> #include<cstdlib>
> #include<cstring>
> #include<cmath>
> using namespace std;
> int main()
> {
> 	__int64 x,y,L,m,n;
> 	scanf("%I64d %I64d %I64d %I64d %I64d",&x,&y,&m,&n,&L);
> 	for(int i=0;i<L;i++)
> 	{
> 		if((x+i*m)%L == (y+i*n)%L)
> 		{
> 			cout<<i<<endl;	
> 			break;
> 		}
> 		if(((x+i*m)%L != (y+i*n)%L)&&i==L-1)
> 			cout<<"Impossible"<<endl;
> 	}
> 	return 0;
> }