#include <bits/stdc++.h>
#define endl '\n'
using namespace std;
using ll = long long;

void solve() {
    ll R, P, Q;
    cin >> R >> P >> Q;
    vector<ll> D(4);
    for (int i = 0; i < 4; i++) cin >> D[i];

    auto judge = [&](ll k) -> bool {
        ll rem = D[3];
        ll need = 0;
        for (int i = 0; i < 3; i++) {
            if (D[i] >= k) rem += D[i] - k;
            else need += k - D[i];
        }
        if (rem < need) return false;
        ll sum = 0;
        sum += need * Q;
        sum += k * P;
        return sum <= R;
    };

    ll ok = 0;
    ll ng = R + 1; // [ok, ng)
    while (ng - ok > 1) {
        ll mid = (ok + ng) / 2;
        if (judge(mid)) {
            ok = mid;
        } else {
            ng = mid;
        }
    }

    cout << ok << endl;
    return;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll T = 1;
    // cin >> T;
    while (T--) {
        solve();
    }
    return 0;
}