#include <atcoder/math>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
	ll n;
	cin >> n;
	vector<ll> p(3), r(3);
	for (int i = 0; i < 3; i++) {
		cin >> p[i];
	}
	for (int i = 0; i < 3; i++) {
		cin >> r[i];
	}
	auto [tr, tm] = atcoder::crt(r, p);
	ll ans = n / tm;
	if (n % tm >= tr) ans++;
	cout << ans << endl;
	return 0;
}