using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Input number 1 : ");

        //string num1_str = Console.ReadLine();

        //int num1 = int.Parse(num1_str);

        int num1 = int.Parse(Console.ReadLine());

        Console.Write("Input number 2 : ");

        int num2 = int.Parse(Console.ReadLine());

        Console.Write("Input number 3 : ");

        int num3 = int.Parse(Console.ReadLine());

        Console.WriteLine();

        int sum = num1 + num2 + num3; 

        Console.WriteLine("Summary of {0}, {1} and {2} is {3} ", num1, num2, num3, sum);

        double average = sum/3.0;

        Console.Write("Average is {0:F}", average);

    }

}