#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    ll r, p, q;
    cin >> r >> p >> q;
    vector<ll> a(3);
    ll d;
    ll s = 0;
    rep(i, 3) cin >> a[i], s += a[i];
    cin >> d;
    s += d;
    sort(a.begin(), a.end());
    vector<ll> x{a[0], min(s / 3, a[1]), min(s / 3, a[2]), s / 3};
    for (int i = 2; i >= 0; i--)
        x[i + 1] -= x[i];
    ll ans = 0;
    rep(i, 4) {
        ll d = p + q * i;
        ll c = min(r / d, x[i]);
        r -= c * d;
        ans += c;
    }
    cout << ans << endl;
    return 0;
}