using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        double[] c = Console.ReadLine().Split().Select(double.Parse).ToArray();

        int ans = 0;

        for (int i = 0; i < n; i++)
        {
            if (c[i] <= c.Sum() / 10) ans += 30;
        }

        Console.WriteLine(ans);      
    }
}