#include <bits/stdc++.h>
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define FORR(i,a,b) for (int i=(a);i>=(b);i--)
#define pb push_back

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef set<int> si;
const int inf = 1e9;
const int mod = 1e9+7;

int n, d[15], x, y;
main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  cin >> n;
  FOR(i, 0, n){
    cin >> d[i];
  }
  sort(d, d+n);
  cin >> x >> y;
  x = max(abs(x), abs(y));
  if(x == 0){
    cout << 0 << endl;
    return 0;
  }
  if(d[n-1] > x){
    FOR(i, 0, n){
      if(d[i] == x){
        cout << 1 << endl;
        return 0;
      }
    }
    cout << 2 << endl;
    return 0;
  }
  ll ans = x / d[n-1];
  if(x % d[n-1] > 0)ans++;
  cout << ans << endl;
  return 0;
}