[JAVA] 백준 9498번 시험성적

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer a = scanner.nextInt();
        
        if (a<=100 && a>=90) {
            System.out.println("A");
        } else if (a<=89 && a>=80) {
            System.out.println("B");
        } else if (a<=79 && a>=70) {
            System.out.println("C");
        } else if (a<=69 && a>=60) {
            System.out.println("D");
        } else {
            System.out.println("F");
        }
    }
}