using System;
using System.Collections.Generic;
using System.Linq;

namespace PracticeAtCoder
{
    class Program
    {
        static void Main(string[] args)
        {
			
			
			//中央値
			string sA = Console.ReadLine();
		

			int intN = int.Parse(sA);
			Boolean flg = true;
			
			if(intN % 2 == 0){
				flg = true;
				intN = intN/2;
				
			}else{
				flg = false;
				intN = intN/2;
			
			}
			string sB = Console.ReadLine();
			string[] t = sB.Split(' ');
			int[] after = t.Select(s => int.Parse(s)).ToArray();
			double bolA = 0;
			//ソートが必要
			Array.Sort(after);
			
			if(flg){
				bolA = (after[intN-1] +after[intN]); 
				Console.WriteLine(bolA/2);
			}else{
				Console.WriteLine(after[intN]);
			}
		}
    }
}