[Bronze V]
Scanner 보다는 더 효율 좋은 BufferedReader를 사용한다.
import java.io.*;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int point = Integer.valueOf(br.readLine());
char grade = '.';
if(point >= 90) {
grade = 'A';
} else if(point >= 80) {
grade = 'B';
} else if(point >= 70) {
grade = 'C';
} else if(point >= 60) {
grade = 'D';
} else {
grade = 'F';
}
System.out.print(grade);
}
}