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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    cout << min(a == 0 ? 10000 : c / a, b == 0 ? 10000 : d / b) << '\n';
}