#include<bits/stdc++.h>
#include<atcoder/all>
#define chmin(x,y) (x) = min((x),(y))
#define chmax(x,y) (x) = max((x),(y))
using namespace std;
using namespace atcoder;
using ll = long long;
const ll mod = 998244353;
using mint = modint998244353;
using Graph = vector<vector<int>>;

int main(){
  // input
  int A,B,C,D;
  cin >> A >> B >> C >> D;
  int X = (A == 0 ? 100000 : C / A), Y = (B == 0 ? 100000 : D / B);
  cout << min(X,Y) << endl;
  
  // solve
  
  
  // output
}