import java.util.Scanner;
class grade{            //记得修改文件名
	public static void main (String[] args){
		System.out.println("请输入您的分数");
		int g; //定义成绩为"g"
		Scanner sc=new Scanner(System.in);
		g=sc.nextInt();
		if(g>100 || g<0)
		{
			System.out.println("您输入的分数有误！");
		
		}
		else
		{
			switch (g/10)
			{
			case 10:
			case 9:
				System.out.println("您的等级为A");
				break;
			case 8:
				System.out.println("您的等级为B");
				break;
			case 7:
				System.out.println("您的等级为C");
				break;
			case 6:
				System.out.println("您的等级为D");
				break;
			default:
				System.out.println("您的等级为E");
				break;
			}
		}
}
}