GradesAniAverageProblems

using System;


namespace _4Histogram___16_mart_2016
{
    class Program
    {
        static void Main(string[] args)
        {

            var studentsCount = double.Parse(Console.ReadLine());
            var top = 0;
            var veryGood = 0;
            var good = 0;
            var bad = 0;

            for (int i = 1; i <= studentsCount; i++)
            {
                double grade = double.Parse(Console.ReadLine());

                if (grade >= 5)
                {
                    top++;
                }
                else if (grade >= 4 && grade <= 4.99)
                {
                    veryGood++;
                }
                else if (grade >= 3 && grade <= 3.99)
                {
                    good++;
                }
                else if (grade < 3)
                {
                    bad++;
                }
            }
            double all = top + veryGood + good + bad;
            double average = studentsCount * 4 / all; ;
            Console.WriteLine($"Top students: {top / studentsCount * 100:f2}%");
            Console.WriteLine($"Between 4.00 and 4.99: {(veryGood / studentsCount * 100):f2}%");
            Console.WriteLine($"Between 3.00 and 3.99: {(good / studentsCount * 100):f2}%");
            Console.WriteLine($"Fail: {(bad / studentsCount * 100):f2}%");

            Console.WriteLine($"Average: {average:f2}");
        }
    }
}