import java.util.Scanner;
public class scoreForm {
public static void main(String[] args) {
//使用Scanner读取学生个数
System.out.println("请输入学生人数");
Scanner scan = new Scanner(System.in);
int num = scan.nextInt();
//创建数组,存储学生成绩
int[] arr = new int[num];
//给数组中元素赋值
for (int i = 0; i < arr.length; i++) {
System.out.println("第" + (i + 1) + "位学生成绩是");
arr[i] = scan.nextInt();
}
//获取最高分,即数组中最大值
int max = arr[0];
for (int i = 0; i < arr.length; i++) {
if (max < arr[i]) {
max = arr[i];
}
}
System.out.println("最高分是" + max);
//根据规则评定学生成绩
for (int i = 0; i < arr.length; i++) {
if (arr[i] >= max - 10) {
lvl='A';
} else if (arr[i] >= max - 20) {
lvl='B';
} else if (arr[i] >= max - 30) {
lvl='C';
} else {
lvl='D';
}
System.out.println("第" + (i + 1) + "位学生等级是"+lvl);
}
}
}