[백준/Java] 9498번 :: 시험 성적

import java.util.Scanner;

public class Main
{
	public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		int score = sc.nextInt();
		
		if (score>=90 && score<=100)
		{
			System.out.print("A");
		}
		else if (score<90 && score>=80)
		{
			System.out.print("B");
		}
		else if (score<80 && score>=70)
		{
			System.out.print("C");
		}
		else if (score<70 && score>=60)
		{
			System.out.print("D");
		}
		else
			System.out.print("F");
	}
}