#include<iostream>
#include<vector>
#include<ranges>
#include<algorithm>
using namespace std;

int main()
{
	int M = 4;
	vector<pair<long long,long long>> A(M);
	for(int i=0;i<M;++i)cin>>A[i].second;
	for(int i=0;i<M;++i)cin>>A[i].first;
	long long T;
	cin >> T;
	ranges::sort(A);
	long long ans = 0;
	for(int i=0;i<M;++i)
	{
		long long q = min(T/A[i].first,A[i].second);
		T -= A[i].first * q;
		ans += q;
	}
	cout << ans << endl;
}