#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif

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

using ll = long long;  // 2^63-1まで 負の値は可
// using ull = unsigned long long;  // 0 <= ull <=2^64-1の範囲 負の値は不可
using vl = vector<ll>;
// using vvl = vector<vl>;
// using P = pair<ll, ll>;
template <typename T>
using MNPQ = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
using MXPQ = priority_queue<T, vector<T>, less<T>>;

#define overload(a, b, c, d, e, ...) e
#define FOR1(i, n) for (int i = 0; i < n; i++)
#define FOR2(i, s, n) for (int i = s; i < n; i++)
#define FOR3(i, s, n, a) for (int i = s; i < n; i += a)
#define rep(...) overload(__VA_ARGS__, FOR3, FOR2, FOR1)(__VA_ARGS__)
#define FOR1_R(i, n) for (int i = n - 1; i >= 0; i--)
#define FOR2_R(i, s, n) for (int i = s - 1; i >= n; i--)
#define FOR3_R(i, s, n, a) for (int i = s - 1; i >= n; i += a)
#define rrep(...) overload(__VA_ARGS__, FOR3_R, FOR2_R, FOR1_R)(__VA_ARGS__)

#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
#define nall(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define YN(flg) cout << (flg ? "Yes" : "No") << "\n"
#define out_grid(x, y, h, w) !(0 <= x && x < h && 0 <= y && y < w)
#define debug(x) cerr << #x << " = " << x << endl;
const long long INF = 4e18;

template <typename T>
istream& operator>>(istream& is, vector<T>& a) {
    for (auto& x : a) is >> x;
    return is;
}

template <typename T>
ostream& operator<<(ostream& os, vector<T>& a) {
    for (int i = 0; i < (int)a.size(); i++) os << a[i] << " ";
    return os;
}

template <typename T1, typename T2>
ostream& operator<<(ostream& os, pair<T1, T2>& p) {
    os << "{" << p.first << "," << p.second << "}";
    return os;
}

template <typename K, typename V>
ostream& operator<<(ostream& os, map<K, V>& a) {
    for (auto& [k, v] : a) os << "{key:" << k << ", item:" << v << "} ";
    return os;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    ll r, p, q;
    cin >> r >> p >> q;
    ll a, b, c, d;
    cin >> a >> b >> c >> d;

    auto f = [&]() -> ll {
        ll mn = min({a, b, c});
        chmin(mn, r / p);

        a -= mn, b -= mn, c -= mn;
        r -= mn * p;
        return mn;
    };
    ll ans = f();

    vector<ll> v = {a, b, c};
    auto ff = [&](ll x) -> bool {
        ll pr = d, m = 0;
        rep(i, 3)(v[i] >= x ? pr : m) += abs(v[i] - x);
        if (pr < m) return 0;
        return r >= m * q + x * p;
    };

    ll ok = 0, ng = 1e10;
    while (ng - ok > 1) {
        ll mid = (ok + ng) / 2;
        // cout << ok << " " << ng << endl;
        (ff(mid) ? ok : ng) = mid;
    }
    cout << ans + ok << endl;

    // sort(nall(v));
    // ll n = min(v[1] - v[0], d);
    // ll e = min(n, r / (p + q));
    // v[0] += e;
    // r -= e * (p + q);
    // a = v[0], b = v[1], c = v[2];
    // ans += f();

    // n = min((v[1] - v[0]) * 2, d);
    // e = min(n, r / (p + q));
    // v[0] += e, v[1] += e;
    // r -= e * (p + q);
    // a = v[0], b = v[1], c = v[2];
    // ans += f();

    // cout << ans << endl;

    return 0;
}