Sudoku Results

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

class SudokuResults
{
    static void Main()
    {

        string input = Console.ReadLine();
        double minutes = 0D;
        double seconds = 0D;
        int counter = 0;


        while (input != "Quit")
        {
            string[] time = input.Split(':');
            minutes = minutes + Double.Parse(time[0]);
            seconds = seconds + Double.Parse(time[1]);
            counter++;

            input = Console.ReadLine();
        }

        double totalTime = minutes * 60 + seconds;
        double avgTime = totalTime / counter;

        if (avgTime > 1440)
        {
            Console.WriteLine("Bronze Star");
            Console.WriteLine("Games - {0} \\ Average seconds - {1:F0}", counter, Math.Ceiling(avgTime));
        }
        else if (avgTime > 720 && avgTime < 1440)
        {
            Console.WriteLine("Sliver Star");
            Console.WriteLine("Games - {0} \\ Average seconds - {1:F0}", counter, Math.Ceiling(avgTime));
        }
        else if (avgTime < 720)
        {
            Console.WriteLine("Gold Star");
            Console.WriteLine("Games - {0} \\ Average seconds - {1:F0}", counter, Math.Ceiling(avgTime));
        }

    }
}