import java.math.BigInteger;
import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] ans= new int[7];
        for(int i=0;i<n;i++){
        	int t= sc.nextInt();
        	ans[t]++;
        }
        int anss=0;
        for(int i=0;i<=5;i++){
        	if(ans[i]<=ans[i+1]) anss=i+1;
        }
        System.out.println(anss);
    }
}