using System;

​

public class Program

{

    public struct grades

    {

        public string Subject;

        public int Grading;

    }

    public static void Main()

    {

        grades []g1 = new grades[20];

        grades temp;

        int n,a, average=0, sum=0;

        Console.Write("Counts : ");

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

        for (n=1;n<=l;n++)

        {

            Console.Write("\nSubject : ");

            g1[n].Subject = Console.ReadLine();

            Console.Write("Grades : ");

            g1[n].Grading = int.Parse(Console.ReadLine());

            sum = sum +g1[n].Grading;

        }

        for (n=1;n<=l;n++)

        {

            for(a=n+1;a<=l;a++)

            {

                if(g1[n].Grading < g1[a].Grading)

                {

                    temp = g1[n];

                    g1[n]= g1[a];

                    g1[a] = temp;

                }

            }

        }

        for(n=1;n<=l;n++)

        {

            Console.WriteLine("{0}\t {1}\t {2}",n,g1[n].Subject,g1[n].Grading);

            //Console.WriteLine(""+ g1[n].Grading);

        }

    average = sum / l;

    Console.Write("\naverage : "+average);

    }

}