using System;

namespace yukicoder
{
    class Program
    {

        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            var str = Console.ReadLine().Split(" ");
            int[] strings = new int[N];
            int sum = 0 , f = 0 , anscount = 0;

            for (int i = 0; i < N; i++)
            {
                strings[i] = int.Parse(str[i]);
                sum += strings[i];
                
            }

            f = sum / 10;

            for (int j = 0; j < N; j++)
            {
                if (strings[j] <= f)
                {
                    anscount += 30;
                }
            }
            Console.WriteLine(anscount);
        }
    }
}