#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001

int main(){
	
	int a,b,c,d;
	cin>>a>>b>>c>>d;
	
	int ans = 10000;
	if(a>0)ans = min(ans,c/a);
	if(b>0)ans = min(ans,d/b);
	cout<<ans<<endl;
	
    return 0;
}