import java.io.*;

    public class GradeReport
   {
      static BufferedReader keyboard = new BufferedReader 
      (new InputStreamReader (System.in));
   
   
       public static void main (String[] args) throws IOException
      {
         char grade = 'q';
      
      // ask the user for a grade
         System.out.print ("Enter an integer grade between 0-100: ");
         
			int score = Integer.parseInt(keyboard.readLine());
      
		//Some logic belongs here in order to convert the score into a 
		//letter grade.
		//if (score >= 90)
		// ...
		if (score >= 90)
		{
			grade = 'a';
		}
		else
		{
			grade = 'f';
		}
		
		
      // output the report to the user
         System.out.print ("That grade is ");
         switch (grade) {
            case 'a':
				case 'A':
               System.out.println ("a perfect score. Well done.");
					break;
            case 'b':
				case 'B':
               System.out.println ("well above average. Excellent.");
               break;
            case 'c':
				case 'C':
               System.out.println ("above average. Nice job.");
               break;
            case 'd':
				case 'D':
               System.out.println ("average.");
               break;
            case 'f':
				case 'F':
               System.out.println ("below average. You should see the");
               System.out.println ("instructor to clarify the material "
                                + "presented in class.");
               break;
            default:
               System.out.println ("not a grade.");
         }

      }
   
   }