[백준] 9498 : 시험 성적 JAVA 풀이

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int score = in.nextInt();
        
        if(score<=100&&score>89){
            System.out.println('A');
        }
        else if(score>79){
            System.out.println('B');
        }
        else if(score>69){
            System.out.println('C');
        }
        else if(score>59){
            System.out.println('D');
        }
        else{
            System.out.println('F');
        }
        in.close();
    }
}