#include <iostream>
#include <cstdio>

using namespace std;

const int N = 20, INF = 0x3f3f3f3f;

int n, d[N], tx, ty;

int main() {
    // freopen("game.in", "r", stdin);
    // freopen("game.out", "w", stdout);

    scanf("%d", &n);
    for (int i = 1; i <= n; ++i) scanf("%d", &d[i]);
    scanf("%d%d", &tx, &ty);

    int dist = max(abs(tx), abs(ty));
    if (dist == 0) {
        puts("0");
        return 0;
    }

    int ans = INF;
    for (int i = 0; i < n; ++i) {
        int cnt = 0;
        if (dist == d[i]) {
            cnt = 1;
        } else if (dist < d[i]) {
            cnt = 2;
        } else {
            cnt = (dist + d[i] - 1) / d[i];
        }
        if (cnt < ans) {
            ans = cnt;
        }
    }

    printf("%d\n", ans);

    return 0;
}