#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-9;
const ll mod=1e9+7;
const int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

int n,x,y;
vi a;

int main(){
	cin>>n;
	a=vi(n);
	bool B=0;
	for(int i=0;i<n;i++) cin>>a[i];
	sort(a.begin(),a.end());
	cin>>x>>y;
	if(!x&&!y){
		cout<<0<<endl;
		return 0;
	}
	int M=max(abs(x),abs(y));
	for(int i=0;i<n;i++) if(a[i]==M) B=1;
	if(B) cout<<1<<endl;
	else cout<<max(2,(M+a[n-1]-1)/a[n-1])<<endl;
}