#define _CRT_SECURE_NO_WARNINGS
#include<sstream>
#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<climits>
#include<cmath>
#include<string>
#include<vector>
#include<set>
#include<map>
#include<queue>
#include<numeric>
#include<functional>
#include<algorithm>
#include<bitset>
#include<tuple>
#include<unordered_set>
#include<random>
using namespace std;
#define INF (1<<29)
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define all(v) v.begin(),v.end()
#define uniq(v) v.erase(unique(all(v)),v.end())




int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	int n;
	int d[15];
	int x, y;
	cin >> n;
	rep(i, n)cin >> d[i];
	cin >> x >> y;
	if (x == 0 && y == 0) {
		cout << 0 << endl;
		return 0;
	}
	x = abs(x);
	y = abs(y);
	rep(i,n) {
		if (max(x,y)==d[i]) {
			cout << 1 << endl;
			return 0;
		}
	}
	int md = *max_element(d, d + n);
	if (max(x,y) < md) {
		cout << 2 << endl;
	}else {
		cout << (max(x, y) + md - 1) / md << endl;
	}
	
	return 0;
}