#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

#include <atcoder/math>

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  ll n, p, q, r, a, b, c;
  cin >> n >> p >> q >> r >> a >> b >> c;
  auto [y, z] = atcoder::crt({ a, b, c }, { p, q, r });
  ll ans = n / z;
  if (n % z >= y) ans++;
  cout << ans << '\n';
  return 0;
}