int inputCount = 0;
            int averageSeconds = 0;
            DateTime data;
            string data_string;
            string[] stars = {
                "Gold star",
                "Silver star",
                "Bronze star"
            };
            data_string = Console.ReadLine ();
            do {
                data = DateTime.ParseExact (data_string, "mm:ss", CultureInfo.InvariantCulture);
                inputCount++;
                averageSeconds = data.Minute * 60 + data.Second;
                data_string = Console.ReadLine ();
            } while (data_string != "Quit");
            {
                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} {2} Average seconds {1}", inputCount, averageSeconds, new string ('\u005C', 1));
                return;
            }