Problem 04. Grades

using System;
using System.Collections.Generic;
using System.Runtime.Remoting.Channels;

namespace ConsoleApplication
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            var n = decimal.Parse(Console.ReadLine());

            var topStudentCounter = 0;
            var goodCounter = 0;
            var almostCounter = 0;
            var fail = 0;

            decimal x = 0;

            for (int i = 0; i < n; i++)
            {
                decimal grade = decimal.Parse(Console.ReadLine());
                x += grade;

                if (grade >= (decimal) 5.00)
                {
                    topStudentCounter++;
                }
                else if (grade >= (decimal) 4.00 && grade <= (decimal) 4.99)
                {
                    goodCounter++;
                }
                else if (grade >= (decimal) 3.00 && grade <= (decimal) 3.99)
                {
                    almostCounter++;
                }
                else
                {
                    fail++;
                }
            }
            Console.WriteLine("Top students: {0:f2}%",(100/n)*topStudentCounter);
            Console.WriteLine("Between 4.00 and 4.99: {0:f2}%",(100/n)*goodCounter);
            Console.WriteLine("Between 3.00 and 3.99: {0:f2}%",(100/n)*almostCounter);
            Console.WriteLine("Fail: {0:f2}%",(100/n)*fail);
            Console.WriteLine("Average: {0:f2}",x/n);
        }
    }
}