using System;
using System.Collections.Generic;
namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
#if LocalDebug
            var exStdIn = new System.IO.StreamReader("stdin.txt");
            System.Console.SetIn(exStdIn);
#endif
            var Num = GetData();
            var RowData = GetList();

            List<int> SortedData = new List<int>();
            foreach (var n in RowData)
            {
                SortedData.Add(int.Parse(n));
            }
            SortedData.Sort();

            if (SortedData.Count % 2 == 0)
            {
                decimal Output = (decimal)(SortedData[(SortedData.Count / 2) - 1] + SortedData[SortedData.Count / 2]) / 2;
                Console.WriteLine(Output);
            }
            else
            {
                var Output = SortedData[SortedData.Count / 2];
                Console.WriteLine(Output);
            }


#if LocalDebug
            System.Console.ReadKey();
#endif
        }




        static int GetData()
        {
            return int.Parse(Console.ReadLine());
        }

        static string[] GetList()
        {
            return Console.ReadLine().Split(' ');
        }



    }
}