#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define mt make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    while(cin >> n) {
        vll d(n);
        rep(i, n)cin >> d[i];
        sort(all(d));

        ll x, y;
        cin >> x >> y;
        x = abs(x), y = abs(y);
        ll z = max(x, y);
        ll ans = 0;
        if(z == 0) ans = 0;
        else if(binary_search(all(d), z)) {
            ans = 1;
        } else if(d.back() > z) {
            ans = 2;
        } else {
            ans = (z + d.back() - 1) / d.back();
        }
        cout << ans << endl;
    }
}