#include <iostream>
#include <algorithm>
#include <limits>

int main()
{
    int a, b, c, d;
    std::cin >> a >> b >> c >> d;
    int nori = a == 0 ? std::numeric_limits<int>::max() : c / a;
    int housa = b == 0 ? std::numeric_limits<int>::max() : d / b;
    int result = std::min(nori, housa);
    std::cout << result << std::endl;
    return 0;
}