namespace CA3
{
    public class Time
    {
        private int second;

        public Time(int hour = 0, int minute = 0, int second = 0)
        {
            SetTime(hour, minute, second);
        }
        public Time(Time t) :
            this(t.Hour, t.Minute, t.Second)
        {
        }
        public void SetTime(int hour, int minute, int second)
        {
            Hour = hour;
            Minute = minute;
            Second = second;
        }
        public Time Next(int hour, int minute, int second)
        {
            Time newTime = new Time(this);
            newTime.second += hour * 3600 + minute * 60 + second;
            newTime.second %= 24 * 3600;
            return newTime;
        }
        public int Hour
        {
            get
            {
                return second / 3600;
            }
            set
            {
                if (value < 0 || value > 23)
                {
                    throw new ArgumentOutOfRangeException(nameof(value), value,
                        $"Hour must be 0 - 23");
                }
                second += (value - Hour) * 3600;
            }
        }
        public int Minute
        {
            get
            {
                return (second % 3600) / 60;
            }
            set
            {
                if (value < 0 || value > 59)
                {
                    throw new ArgumentOutOfRangeException(nameof(value), value,
                        $"Minute must be 0 - 59");
                }
                second += (value - Minute) * 60;
            }
        }
        public int Second
        {
            get
            {
                return second % 60;
            }
            set
            {
                if (value < 0 || value > 59)
                {
                    throw new ArgumentOutOfRangeException(nameof(value), value,
                        $"Second must be 0 - 59");
                }
                second += value - Second;
            }
        }
        public string ToUniversalString() =>
            $"{Hour:D2}:{Minute:D2}:{Second:D2}";
        public override string ToString() =>
            $"{((Hour == 0 || Hour == 12) ? 12 : Hour % 12)}:" +
            $"{Minute:D2}:{Second:D2} {(Hour < 12 ? "AM" : "PM")}";
    }

    class Program
    {
        public static void Main()
        {
            var t1 = new Time();
            var t2 = new Time(2);
            var t3 = new Time(21, 34);
            var t4 = new Time(12, 25, 42);
            var t5 = new Time(t4);
            t5.Hour = 15;
            var t6 = t5.Next(10, 40, 0);
            Console.WriteLine("t1:");
            Console.WriteLine(t1.ToUniversalString());
            Console.WriteLine(t1.ToString());
            Console.WriteLine("t2:");
            Console.WriteLine(t2.ToUniversalString());
            Console.WriteLine(t2.ToString());
            Console.WriteLine("t3:");
            Console.WriteLine(t3.ToUniversalString());
            Console.WriteLine(t3.ToString());
            Console.WriteLine("t4:");
            Console.WriteLine(t4.ToUniversalString());
            Console.WriteLine(t4.ToString());
            Console.WriteLine("t5:");
            Console.WriteLine(t5.ToUniversalString());
            Console.WriteLine(t5.ToString());
            Console.WriteLine("t6:");
            Console.WriteLine(t6.ToUniversalString());
            Console.WriteLine(t6.ToString());
        }
    }
}