using System;

public class Program

{

    public static void Main()

    {

        //ANA FERNANDA MORALES

        int G;

        Console.WriteLine("Write your final grade (0-10) and I will tell you if it is good or needs to be improved.");

​

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

​

            switch (G)

            {

                case 0:

                case 1:

                case 2:

                case 3:

                case 4:

                case 5:

                case 6:

                    Console.WriteLine("OH NO YOU NEED TO IMPROVED THEM!");

                    break;

​

                case 7:

                case 8:

                case 9:

                case 10:

                    Console.WriteLine("NICE! IT'S VERY GOOD.");

                    break;

​

             default:

                    Console.WriteLine();

                    Console.WriteLine("HEY, IT IS IMPOSSIBLE TO HAVE THAT GRADE");

                    break;

            }

    }

}