sudoku

using System;
using System.Globalization;
class Program
{
    static void Main()
    {
        int inputCount = 0;
        int averageSeconds = 0;
        int totalSeconds = 0;
        //DateTime data;
        string[] stars =
        {
            "Gold Star", // star was lowercase
            "Silver Star",
            "Bronze Star"
        };
        string input = Console.ReadLine(); // read input
        do
        {
            int minutes = int.Parse(input.Substring(0, 2)); // first two digits will always be minutes since input is never larger than 99:59
            int seconds = int.Parse(input.Substring(3, 2)); // digits after colon are seconds
            //data = DateTime.ParseExact(input, "mm:ss", CultureInfo.InvariantCulture);
            // datetime not suitable since anything above 59:59 isnt valid
            inputCount++;
            totalSeconds += minutes * 60 + seconds; // add time
            input = Console.ReadLine();
        } while (input != "Quit");

        averageSeconds = (int)Math.Ceiling((double)totalSeconds / inputCount); // get average time and round up
        if (averageSeconds < 720)
        {
            Console.WriteLine(stars[0]);
        }
        else if (averageSeconds >= 720 && averageSeconds < 1440)
        {
            Console.WriteLine(stars[1]);
        }
        else
        {
            Console.WriteLine(stars[2]);
        }
        Console.WriteLine("Games - {0} \\ Average seconds - {1}", inputCount, averageSeconds); // escaped '\'
        return;

    }
}