public class Array1 {
    public static void main(String[] args){

        Pritimive d=new Pritimive();
        for (int i=0;i<d.t.length;i++){
            System.out.println(d.t[i]);
        }
        d.t[0]=true;
        d.t[1]=true;
        d.t[2]=true;
        for (int j=0;j<d.t.length;j++){
            System.out.println(d.t[j]);
        }
    }
}
 
class Pritimive{
    boolean[] t=new boolean[3];
}

import java.util.Scanner;
public class w {
    public static void main(String[] args){
        //從鍵盤輸入學生的個數
        Scanner s=new Scanner(System.in);
        System.out.println("請輸入學生人數：");
        int count=s.nextInt();//寫入學生個數
        System.out.println("請輸入"+count+"個成績：");
        
 
//定義一個數組儲存分數
        int[] scores=new int[count];
        //定義最高分
        int maxscore=0;
        //找到最高分
        for (int i=0;i< scores.length;i++){
            int score=s.nextInt();//寫入學生成績
            scores[i]=score;
            if (scores[i]>maxscore){
                maxscore=scores[i];

            }
        }
        
 
//輸出最高分
        System.out.println("最高分是：");
        System.out.println(maxscore);
        //輸出學生成績
        for (int i=0;i<scores.length;i++){
            char grade;
            if (scores[i]>=maxscore-10){
                grade='A';
            }else if (scores[i]>=maxscore-20){
                grade='B';
            }else if (scores[i]>=maxscore-30){
                grade='C';
            }else{
                grade='D';
            }
            System.out.println("student "+i+" score is "+scores[i]+" grade is "+grade);
        }
    }
}