using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter s1 marks:");

        int s1=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("enter s2 marks:");

        int s2=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("enter s3 marks:");

        int s3=Convert.ToInt32(Console.ReadLine());

        int total=s1+s2+s3;

        double avg=total/3;

        Console.WriteLine("total marks are:"+total);

        Console.WriteLine(" average marks:"+avg);

        Console.WriteLine("subject marks s1:"+s1);

        Console.WriteLine("subject marks s2 :"+s2);

        Console.WriteLine("subject marks s3:"+s3);

    }

}