class Program
{
    static void Main(string[] args)
    {
        string inputCount = Console.ReadLine()!;
        string[] inputSlip = Console.ReadLine()!.Split(' ');
        int totalSlip = 0;
        
        for (int i = 0; i < inputSlip.Length; i++)
        {
            int slip = int.Parse(inputSlip[i]);
            totalSlip += slip;
        }

        int border = totalSlip / 10;
        int totalPrice = 0;

        for (int i = 0; i < inputSlip.Length; i++)
        {
            int slip = int.Parse(inputSlip[i]);
            if (slip <= border)
            {
                totalPrice += 30;
            }
        }

        Console.WriteLine(totalPrice);
    }
}