#include <iostream>
#include <cassert>
using namespace std;

int main() {
	int a, b, c, d;
	cin >> a >> b >> c >> d;
	assert(0 <= a && a <= 1000);
	assert(0 <= b && b <= 1000);
	assert(0 <= c && c <= 1000);
	assert(0 <= d && d <= 1000);

	int ans;
	if (a == 0) ans = d / b;
	else if (b == 0) ans = c / a;
	else ans = min(c / a, d / b);
	cout << ans << endl;
}