#include <iostream>
#include <algorithm>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
//#define endl "\n";
int main(){
    ll R, P, Q;
    ll num[4];
    cin >> R >> P >> Q;
    cin >> num[0] >> num[1] >> num[2] >> num[3];

    ll l = 0, r = (num[0] + num[1] + num[2] + num[3]) / 3;
    while(l < r){
        ll m = (l + r + 1) / 2;
        ll cost = P * m;
        for(int i = 0; i < 3; i++){
            if(num[i] < m){
                cost += abs(m - num[i]) * Q;
            }
        }
        //cout << l << " " << r << " " << cost << endl;
        if(R < cost) r = m - 1;
        else l = m;
    }
    cout << l << endl;
    return 0;
}