#include<iostream>
using namespace std;
int main()
{
	long int  x,y,m,n,L;
	int flag=0;
	int l;
	cout<<"please input the value of x,y,m,n,L"<<endl;
	cin>>x>>y>>m>>n>>L;
    if(x<=0||x>=2000000000)
		cout<<"the value of x is wrrong"<<endl;
	if(y<=0||y>=2000000000)
		cout<<"the value of y is wrrong"<<endl;
	if(m<=0||m>=2000000000)
		cout<<"the value of y is wrrong"<<endl;
    if(m<=0||n>=2000000000)
		cout<<"the value of y is wrrong"<<endl;
    if(L<=0||L>=2100000000)
		cout<<"the value of y is wrrong"<<endl;
 
 
	 for(int time=0;;time++)
			 if(!flag)		  
		   {	l=time*m+x-(time*n+y);
		        if(l%L==0)
					{flag=1;cout<<"the time is "<<time<<endl;
				     break;}
		   }
	
					if(!flag) cout<<"inpossible"<<endl;
			  
 
		   
  
  return 0;
}