using System;
public class Program
{
    public static void Main()
    {
        int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;

        int m = 0;
        for (int i = 0; i < num; i++)
        {
            m += int.Parse(str[i]);
        }
        m /= 10;
        int a = 0;
        for (int i = 0; i < num; i++)
        {
            if (int.Parse(str[i]) <= m)
            {
                a += 30;
            }
        }
        Console.WriteLine(a);

    }
}