Sudoku_Results

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 = double.Parse(format[0]);
        double ss = double.Parse(format[1]);

        double minutes = mm * 60;
        double sum = minutes + ss;
        double counter = 1;

        string word = string.Empty;

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

        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));
        }
    }
}