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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int a,b,c,d; cin >> a >> b >> c >> d;
    int answer = 1001001001;
    if(a) answer = c/a;
    if(b) answer = min(answer,d/b);
    cout << answer << endl;
}