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

int main() {
    int n;
    cin >> n;

    vector<int> d(n);
    for (int i = 0; i < n; i++) {
        cin >> d[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) == d[i]) {
            cout << 1 << endl;
            return 0;
        }
    }

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