using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ForYukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int[] C = Console.ReadLine().Split().Select(int.Parse).ToArray();

            int total = 0;
            foreach (var item in C)
            {
                total += item;
            }

            int ans = 0;
            for (int i = 0; i < N; i++)
            {
                if (C[i] <= total /10)
                {
                    ans += 30;
                }
            }

            Console.WriteLine(ans);
        }
    }
}