import java.util.Scanner;

public class Grades {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int students=Integer.parseInt(scanner.nextLine());
        double fail=0;
        double from3=0;
        double from4=0;
        double top=0;
        double sum=0;
        for (int i = 1; i <=students ; i++)
        {double grade=Double.parseDouble(scanner.nextLine());
        sum=sum+grade;
        if(grade>=5){top++;}
        else if(grade>=4&&grade<=4.99){from4++;}
        else if(grade>=3&&grade<=3.99){from3++;}
        else if(grade<3){fail++;}}
        double average=(double)sum/students;
        double per_top=((double)(top/students))*100;
        double per_from4=((double)(from4/students))*100;
        double per_from3=((double)(from3/students))*100;
        double per_fail=((double)(fail/students))*100;

        System.out.print("Top students: ");
        System.out.printf("%.2f",per_top);
        System.out.println("%");
        System.out.print("Between 4.00 and 4.99: ");
        System.out.printf("%.2f",per_from4);
        System.out.println("%");
        System.out.print("Between 3.00 and 3.99: ");
        System.out.printf("%.2f",per_from3);
        System.out.println("%");
        System.out.print("Fail: ");
        System.out.printf("%.2f",per_fail);
        System.out.println("%");
        System.out.print("Average: ");
        System.out.printf("%.2f",average);


    }
    }