using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter the marks of the five subjects:");

​

        double sum = 0;

​

        for (int i = 1; i <= 5; i++)

        {

            Console.Write("Subject " + i + ": ");

            double score = double.Parse(Console.ReadLine());

            sum += score;

        }

​

        double average = sum / 5;

        Console.WriteLine("The average score is: " + average.ToString("0.00"));

    }

}

​