#include<bits/stdc++.h>
using namespace std;


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

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

	if(x == 0 && y == 0){
		cout << 0 << endl;
		return 0;
	}

	for(int i = 0; i < n; i++){
		if(max(x, y) == v[i]){
			cout << 1 << endl;
			return 0;
		}
	}

	int m = *max_element(v.begin(), v.end());
	cout << max(2, (max(x, y) + m - 1) / m) << endl;
	return 0;
}