import java.util.Scanner;
public class MyTest{
public static void main(String[] args){
System.out.println("请输入成绩");
Scanner in=new Scanner(System.in);
int a = in.nextInt();
if (a < 0 || a >100){
System.out.println("对不起,输入有误");
}
else if(a>90){
System.out.println("良好");
}
else if(a>80){
System.out.println("一般");
}
else if(a>=60){
System.out.println("及格");
}
else if(a<60){
System.out.println("不及格");
}
}
}