import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        // Prompt user for input
        System.out.print("Enter your grade (0-100): ");
        int grade = scanner.nextInt();
        // Determine letter grade using if-else
        char letterGrade;
        if (grade >= 90 && grade <= 100) {
            letterGrade = 'A';  // For grades 90-100
        } else if (grade >= 80 && grade < 90) {
            letterGrade = 'B';  // For grades 80-89
        } else if (grade >= 70 && grade < 80) {
            letterGrade = 'C';  // For grades 70-79
        } else if (grade >= 60 && grade < 70) {
            letterGrade = 'D';  // For grades 60-69
        } else if (grade >= 0 && grade < 60) {
            letterGrade = 'F';  // For grades 0-59
        } else {
            System.out.println("Invalid grade. Please enter a grade between 0 and 100.");
            scanner.close();
            return;
        }
        // Use switch to print the letter grade
        switch (letterGrade) {
            case 'A':
            case 'B':
                System.out.println("You passed with a grade of: " + letterGrade);
                break;
            case 'C':
                System.out.println("You have a grade of: C");
                break;
            case 'D':
                System.out.println("You barely passed with a grade of: D");
                break;
            case 'F':
                System.out.println("Unfortunately, you failed with a grade of: F");
                break;
            default:
                System.out.println("Unexpected error.");
                break;
        }
    }
}