using System;

public class Program

{

    public static void Main()

    {

        int a = int.Parse(Console.ReadLine());

        int b = int.Parse(Console.ReadLine());

        int c = int.Parse(Console.ReadLine());

        if (a > 0 && b > 0 && c > 0 && a + b > c && a + c > b && b + c > a)

        {

            int p = a + b + c;

            double p1 = p / 2.0;

            Console.WriteLine(p);

            Console.WriteLine(p1);  

        }

        else

        {

            Console.WriteLine("Грешка");

        }

    }

}