import java.util.*;
public class main{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
        int n=0,i,j,temp=0;
        n=scan.nextInt();
        int[] array=new int[n];
        for(i=0;i<n;i++)
        {
            array[i]=scan.nextInt();
        }
        for(i=1;i<=2;i++)
        {
            int max=i;
            for(j=i+1;j<array.length;j++)
            {
                if(array[j]>max)
                {
                    max=j;
                }
            }
            temp=array[i];
            array[i]=array[max];
            array[max]=temp;
        }
        System.out.println(array[max-1]);
    }
}