#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define loop(i,a,b) for(i=a;i<b;i++)
#define rloop(i,a,b) for(i=a;i>=b;i--)
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
const int inf=1000000001;
const ll INF=1e16;
#define MOD 1000000007
#define mod 1000000009
#define pi 3.14159265358979323846

int main(){
	int n,i;
	cin>>n;
	vi d(n);
	loop(i,0,n){
		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;
	}
	int M=0;
	loop(i,0,n){
		if((d[i]==x && d[i]>=y)||(d[i]==y && d[i]>=x)){
			cout<<1<<endl;
			return 0;
		}
		M=max(M,d[i]);
	}
	int ans=0;
	int l=max(x,y);
	while(l>2*M){
		ans++;
		l-=M;
	}
	ans+=2;
	cout<<ans<<endl;
}