#include <iostream>
using namespace std;

int main() {
	int a, b, c, d;
	cin >> a >> b >> c >> d;

	int ans = 1000;
	if (a >= 1) ans = min(ans, c / a);
	if (b >= 1) ans = min(ans, d / b);
	cout << ans << endl;
	return 0;
}