//
//
//	If score>=90 out "A grade of A"; 80-90 out "B"; 70-80, "C", ...
//	if score < 0 or > 100, out "Error"
//
//	Use nested-if P.63

import java.util.Scanner;

class ConvertGrades1
{
	public static void main(String[] args)
	{
			Scanner input = new Scanner(System.in);

			double score;

			System.out.print("Input the score: ");
			score = input.nextDouble();

			if (score>100 || score <0)
			{
				System.out.println("Invalid.\n\n\n");
			}
			else if (score>=90)
			{
				System.out.println("You got an A.\n\n\n");
			}
			else if (score>=80)
		  {
							System.out.println("You got an B.\n\n\n");
			}
			else if (score>=70)
		  {
										System.out.println("You got an C.\n\n\n");
			}
			else if (score>=60)
		  {
										System.out.println("You got an D.\n\n\n");
			}
			else if (score>=0)
		  {
										System.out.println("You got an F.\n\n\n");
			}
/*			else
			{
				System.out.println("Invalid input.\n\n\n");
			}
*/
	}
}