using System;

public class Program

{

    public static void Main()

    {

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

        //string number1_str = Console.ReadLine();

        //int number1 = int.Parse(number1);

        int number1 = int.Parse(Console.ReadLine());

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

        int number2 = int.Parse(Console.ReadLine());

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

        int number3 = int.Parse(Console.ReadLine());

        int sum =number1+number2+number3;

        Console.WriteLine("Summary of {0}, {1} and {2} is {3}",number1,number2,number3,sum);

        double average = sum/3.0;

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

    }

    }