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

int main()
{
    int A, B, C, D;
    cin >> A >> B >> C >> D;

    int ans1;
    int ans2;
    if (A == 0)
    {
        ans1 = 1e9;
    }
    else
    {
        ans1 = C / A;
    }
    if (B == 0)
    {
        ans2 = 1e9;
    }
    else
    {
        ans2 = D / B;
    }

    cout << min(ans1, ans2);
}