using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("enter how many students");

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

         float [] myaveragearr = new float[rows];

         int sum = 0;

        int [,]myarray = new int[rows,5];

        for(int i = 0;i<rows;i++)

        {

            Console.WriteLine("student {0}" ,i+1);

            for(int t=0;t<5;t++)

            {

                Console.WriteLine("\n test score:{0}",t+1); 

                myarray[i,t] = Convert.ToInt32(Console.ReadLine());

                sum += myarray[i,t];

         }

            float average = sum/5;

             myaveragearr[i] = average;

        } 

        Console.WriteLine("welcome to the grade result:\n");

        Console.WriteLine("\t\t\t test1 \t  test2 \t test3 \t test4 \ttest5 \taverage\tgrade");

        for(int i=0;i<rows;i++)

        {

            Console.Write("student{0}",i+1);

            for(int t=0;t<5;t++)

            {

                Console.Write(" \t\t {0}",myarray[i,t]);    

         }

            Console.Write("\t {0}", myaveragearr[i]);

            Console.WriteLine("");

        }

    }

}