package zzz;

import javax.swing.JOptionPane;

import java.util.*;

public class llyytt {

 

 public static void main(String[] args) {

  Scanner input=new Scanner(System.in);

  char grade;

  String num=JOptionPane.showInputDialog(null,"请输入一個分数:","梁燕婷",JOptionPane.QUESTION_MESSAGE);

  int aa=Integer.parseInt(num);

  // TODO Auto-generated method stub

   if(aa>=80)

    grade='A';

   else if(aa>=70)

    grade='B';

   else if(aa>=60)

    grade='C';

   else

    grade='D';

   JOptionPane.showMessageDialog(null,grade,"梁燕婷",JOptionPane.INFORMATION_MESSAGE);

    System.out.print((aa*100)/100.0);

 }

}