#include<iostream>
#include<cmath>
#include<algorithm>
#include<climits>

#define REP(i,s,n) for(int i=s;i<n;++i)
#define rep(i,n) REP(i,0,n)

using namespace std;

typedef long long ll;
#define MAX 30
int n;
ll d[MAX];
ll x,y;

void compute() {
  if( x == 0 && y == 0 ) {
    puts("0");
    return;
  }
  x = llabs(x), y = llabs(y);
  sort(d,d+n);
  if( max(x,y) < d[n-1] ) {
    rep(i,n) {
      if( max(x,y) == d[i] ) {
	cout << 1 << endl;
	return;
      }
    }
    cout << 2 << endl;    
  } else {
    ll ans = ceil( max(x,y) / (double)d[n-1] );
    cout << ans << endl;
  }
}

int main() {
  cin >> n;
  rep(i,n) cin >> d[i];
  cin >> x >> y;
  compute();
}