문제출처 https://www.acmicpc.net/problem/9498
내가 작성한 코드
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int score;
score = sc.nextInt();
if(score>= 90) {
System.out.println("A");
}
else if(score>=80) {
System.out.println("B");
}
else if(score>=70) {
System.out.println("C");
}
else if(score>=60) {
System.out.println("D");
}
else {
System.out.println("F");
}
}
}