#include <bits/stdc++.h>
using namespace std;

int main() {
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    int x = (a != 0 ? c / a : 2000);
    int y = (b != 0 ? d / b : 2000);
    cout << min(x, y) << endl;
}