1546 평균

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace Syntax1
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            int[] arr = new int[n];
            var input = Console.ReadLine();
            var arr2 = input.Split(' ');
            int m = 0;
            for (int i = 0; i < arr2.Length; i++)
            {
                arr[i] = int.Parse(arr2[i]);
                if (arr[i] > m)
                {
                    m = arr[i];
                }
            }
            float b = 0;
            for (int j = 0; j < arr2.Length; j++)
            {
               var c = (float)arr[j] /(float) m * 100;
                b = b + c;
            }
            Console.WriteLine(b / (float)n);
        }
 
    }
 
}