#include<bits/stdc++.h>
#include <unistd.h>
#include <signal.h>
#define ll long long
using namespace std;
ll x,y,m,n,l;
ll a,b,cnt;
int main() {
	cin>>x>>y>>m>>n>>l;
	a=x,b=y;
	while(a!=b) {
		if(x+m>l) {
			x=x+m-l;
			a=x;
			cnt++;
		} else {
			x+=m;
			a=x;
			cnt++;
		}
		if(y+n>l) {
			y=y+n-l;
			b=y;
		} else {
			y+=n;
			b=y;
		}
	}
	cout<<cnt;
}