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

int main() {
    int A, B, C, D;
    cin >> A >> B >> C >> D;
    int ans = 1000;
    if (A)
        ans = min(ans, C / A);
    if (B)
        ans = min(ans, D / B);
    cout << ans << '\n';
}