/* -*- coding: utf-8 -*-
 *
 * 467.cc: No.467 隠されていたゲーム - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 15;

/* typedef */

/* global variables */

int ds[MAX_N];

/* subroutines */

/* main */

int main() {
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) cin >> ds[i];

  int x, y;
  cin >> x >> y;
  x = abs(x), y = abs(y);
  int maxxy = max(x, y);

  bool eqd = false;
  int maxd = 0;
  for (int i = 0; i < n; i++) {
    if (maxxy == ds[i]) eqd = true;
    if (maxd < ds[i]) maxd = ds[i];
  }

  int ans;
  if (x == 0 && y == 0) ans = 0;
  else if (eqd) ans = 1;
  else if (maxxy < maxd) ans = 2;
  else ans = (maxxy + maxd - 1) / maxd;

  printf("%d\n", ans);
  return 0;
}