import java.util.Scanner;

 /**

  * @author 冰樱梦

  * 时间：2018年下半年

  * 题目：指定等级

  *

  */

 public class Exercise07_01 {

     public static void main(String[] args){

         int score[]=new int[100];

         Scanner input = new Scanner(System.in);

         System.out.println("Enter the number of students: ");

         int students=input.nextInt();

         System.out.println("Enter " + students +" scores: ");

         int best=0;

         for(int i=0;i<students;i++){

             score[i]=input.nextInt();

             if(score[i]>best){

                 best=score[i];

             }

         }

         for(int i=0;i<students;i++){

             if(score[i]>=best-10){

                 System.out.println("Student " + i +" scores is " + score[i] + " and grade is A");

             }

             else if(score[i]>=best-20){

                 System.out.println("Student " + i +" scores is " + score[i] + " and grade is B");

             }

             else if(score[i]>=best-30){

                 System.out.println("Student " + i +" scores is " + score[i] + " and grade is C");

             }

             else if(score[i]>=best-40){

                 System.out.println("Student " + i +" scores is " + score[i] + " and grade is D");

             }

             else{

                 System.out.println("Student " + i +" scores is " + score[i] + " and grade is F");

             }

         }

     }

 }