using System;

public class Program

{

    public static void Main()

    {

        string[] tokens = (Console.ReadLine().Split());

        int a = int.Parse(tokens[0]);

        int b = int.Parse(tokens[1]);

        int b1 = int.Parse(tokens[2]);

        int b2 = int.Parse(tokens[3]);

        int b3 = int.Parse(tokens[4]);

        int b4 = int.Parse(tokens[5]);

        int b5 = int.Parse(tokens[6]);

        int b6 = int.Parse(tokens[7]);

        int b7 = int.Parse(tokens[8]);

        int b8 = int.Parse(tokens[9]);

        Console.WriteLine(((a+b+b1+b2+b3+b4+b5+b6+b7+b8)/100)*60);

    }

}