#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;

int main(){
	ll N,P,Q,R,A,B,C;
	cin >> N >> P >> Q >> R >> A >> B >> C;
	N++;
	auto [r,m] = crt({A,B,C},{P,Q,R});
	
	ll ans = N / m + (N % m >= r ? 1 : 0);
	cout << ans << endl;
}