SudokuTeoRedacted100/100

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class Sudoku_Results
{
    static void Main(string[] args)
    {
        //31.ProgBasicsExam_8_November2015

        //Sudoku_Results

        string[] format = Console.ReadLine().Split(':');

        double mm = 0.0D;
        double ss = 0.0D;

        double minutes = 0.0D;
        double sum = 0.0D;
        double counter = 0;

        string word = string.Empty; // Не е нужно

        while (format[0] != "Quit")
        {
            mm = double.Parse(format[0]);
            ss = double.Parse(format[1]);
            minutes = mm * 60;
            sum += minutes + ss;
            counter++;
            format = Console.ReadLine().Split(':');
        }

        bool isGold = (sum) / counter < 720;

        if (isGold)
        {
            Console.WriteLine("Gold Star");
            Console.WriteLine("Games - {0} \\ Average seconds - {1}", counter, Math.Ceiling(sum / counter));
        }

        else if (sum / counter > 720 && sum / counter < 1440)
        {
            Console.WriteLine("Silver Star");
            Console.WriteLine("Games - {0} \\ Average seconds - {1}", counter, Math.Ceiling(sum / counter));
        }
        else
        {
            Console.WriteLine("Bronze Star");
            Console.WriteLine("Games - {0} \\ Average seconds - {1}", counter, Math.Ceiling(sum / counter));
        }
    }
}