#include <bits/stdc++.h>

void solve() {
  int A, B, C, D; std::cin >> A >> B >> C >> D;
  if (A == 0) std::cout << D/B << std::endl;
  else if (B == 0) std::cout << C/A << std::endl;
  else std::cout << std::min(C/A, D/B) << std::endl;
}

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

  int testcases = 1;
  //std::cin >> testcases;
  for (;testcases--;) solve();

  return 0;
}