#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll=long long;
using ld=long double;
using st=string;
using P=pair<ll,ll>;
typedef atcoder::modint mint;
ll inf=9e18;
template<typename T, int s, int i = 0>
auto vec(const ll (&sizes)[s], const T& init = T()){
  if constexpr(i < s) return vector(sizes[i], vec<T, s, i+1>(sizes, init));
  else return init;
}


int main(){
  ll R,p,q,a,b,c,d;
  cin>>R>>p>>q>>a>>b>>c>>d;
  ll upper=(a+b+c+d)/3;

  ll l=0,r=min(upper,R/p)+1;
  ll x=(l+r)/2;
  while(l+1<r){
    ll rt=max(x-a,0LL)+max(x-b,0LL)+max(x-c,0LL);
    if(p*x+q*rt<=R){
      l=x;
    }else{
      r=x;
    }
    x=(l+r)/2;
  }
  cout<<l<<"\n";
}