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

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

    long long R,P,Q; cin >> R >> P >> Q;
    long long a,b,c,d; cin >> a >> b >> c >> d;
    long long low = 0,high = (a+b+c+d)/3+1;
    while(high-low > 1){
        long long mid = (high+low)/2;
        long long need = 0;
        if(min({a,b,c}) >= mid) need += mid*P;
        else{
            need += min({a,b,c})*P;
            long long x = a,y = b,z = c,left = mid-min({a,b,c});
            x -= min({a,b,c});
            y -= min({a,b,c});
            z -= min({a,b,c});
            if(x > y) swap(x,y);
            if(y > z) swap(y,z);
            if(x > y) swap(x,y);
            if(y >= left) need += left*(P+Q);
            else{
                need += y*(P+Q),left -= y;
                need += left*(P+Q+Q);
            }
        }
        if(need <= R) low = mid;
        else high = mid;
    }
    cout << low << endl;
}