using System;

public class Program

{

    public static void Main()

    {

​

    int number_Of_Students;

    int i;

    ONE:

    try

    {

        Console.Write("How many students in the class: ");

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

        if(number_Of_Students < 6){Console.WriteLine("Invalid Input "); goto ONE;}

    }

    catch(Exception){Console.WriteLine("Invalid input"); goto ONE;}

​

    string[] student_Name = new string[number_Of_Students];

    int[] student_Result = new int[number_Of_Students];

​

    for (i = 0; i < number_Of_Students; i++)

    {

        TWO:

​

        Console.Write("What is the name of student {0}: ", i + 1);

        student_Name[i] = Console.ReadLine();

        if(student_Name[i] == ""){Console.WriteLine("Invalid input "); goto TWO;}   

        THREE:

        try

        {

        Console.Write("What is the test result for {0}: ", student_Name[i]);

        student_Result[i] = int.Parse(Console.ReadLine());

        if(student_Result[i] < 0 && student_Result[i] > 100){Console.WriteLine("Invalid input"); goto THREE;}

        }

        catch(Exception){Console.WriteLine("Invalid input ");goto THREE;}

    }

​

    Array.Sort(student_Result, student_Name);

    Array.Reverse(student_Result);

    Array.Reverse(student_Name);

​

    for (int A = 0; A < number_Of_Students; A++)

    {

        Console.WriteLine(student_Name[A]);

        if(student_Result[A] > 70)

            Console.WriteLine("Distinction");

        else if(student_Result[A] > 51 && student_Result[A] < 69)

            Console.WriteLine("Merit");

        else if(student_Result[A] > 41 && student_Result[A] < 50)

            Console.WriteLine("Pass");

        else

            Console.WriteLine("Fail");

    }

​

    Console.ReadLine();

    }

}