#include <bits/stdc++.h>
using namespace std;
int main() {
	int x,y,z,n,m,cnt = 0;
	cin >> x >> y >> z >> n >> m;
	for(int a = 0; a <= m; ++a){
		for(int b = 0; b <= m; ++b){
			for(int c = 0; c <= m; c += 3)
			{
				if(a+b+c == m && c%3 == 0 && x*a+y*b+c/z == n) cnt++;
			}
		}
	}
	cout << cnt;
}