using System;


class Grades
{
    static void Main(string[] args)
    {
        int studentsAtExam = int.Parse(Console.ReadLine());
        double grade, top, veryGood, good, fail, average;

        grade = top = veryGood = good = fail = average = 0;

        for (int i = 0; i < studentsAtExam; ++i)
        {
            grade = double.Parse(Console.ReadLine());
            average += grade;

            if (grade >= 5) top++;
            else if (grade >= 4) veryGood++;
            else if (grade >= 3) good++;
            else fail++;
        }

        Console.WriteLine("Top students: {0}%", ((top / studentsAtExam) * 100).ToString("F"));
        Console.WriteLine("Between 4.00 and 4.99: {0}%", ((veryGood / studentsAtExam) * 100).ToString("F"));
        Console.WriteLine("Between 3.00 and 3.99: {0}%", ((good / studentsAtExam) * 100).ToString("F"));
        Console.WriteLine("Fail: {0}%", ((fail / studentsAtExam) * 100).ToString("F"));
        Console.WriteLine("Average: {0}", (average / studentsAtExam).ToString("F"));
    }
}