using System;

class Program
{
    static void Main(string[] args)
    {
        string line = System.Console.ReadLine().Trim();
        int N = int.Parse(line);
        
        line = System.Console.ReadLine().Trim();
        string[] Data = line.Split(' ');
        Array.Sort(Data);

        if(Data.Length %2 ==0)
        {
            double x = (int.Parse(Data[Data.Length / 2]) + int.Parse(Data[Data.Length / 2 - 1])) / 2;
            System.Console.WriteLine(x);
            return;
        }
        else
        {
            System.Console.WriteLine(Data[(Data.Length-1)/2]);
            return;
        }     
    }
}