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

int main() {
    int n;
    cin>>n;
    int d[n];
    int mxd=0;
    for (int i=0;i<n;i++) {
        cin>>d[i];
        mxd=max(mxd,d[i]);
    }
    int x,y;
    cin>>x>>y;
    x=max(abs(x),abs(y));
    if (x==0) {
        cout<<0<<endl;
        return 0;
    }
    if (x<=mxd) {
        for (int i=0;i<n;i++)
            if (x==d[i]) {
                cout<<1<<endl;
                return 0;
            }
        cout<<2<<endl;
        return 0;
    }
    cout<<(x+mxd-1)/mxd<<endl;
    return 0;
}