#include "bits/stdc++.h"
#define REP(i,n,N) for(int i=(n); i<(N); i++)
#define RREP(i,n,N) for(int i=(N-1); i>=n; i--)
#define CK(n,a,b) ((a)<=(n)&&(n)<(b))
#define ALL(v) (v).begin(),(v).end()
#define p(s) cout<<(s)<<endl
#define p2(a,b) cout<<(a)<<" "<<(b)<<endl
#define v2(T) vector<vector<T>>
typedef long long ll;
using namespace std;
const ll inf=1e18+7;

int N;
int d[16];
int x,y;
int ans;
int main() {
    cin>>N;
    REP(i,0,N) {
        cin>>d[i];
    }
    cin>>x>>y;
    x=abs(x);
    y=abs(y);
    if(x==0&&y==0){
        ans=0;
        p(ans);
        return 0;
    }
    sort(d,d+N);
    bool ok=false;
    REP(i,0,N){
        if(max(x,y)==d[i]){
            ok=true;
        }
    }
    if(ok) ans=1;
    else if(max(x,y)<d[N-1]){
        ans=2;
    }else{
        ans = (max(x,y) + d[N-1] - 1) / d[N-1];
    }
    p(ans);
    return 0;
}