#include <iostream>

#define OPCIONAL 1

class Time
{
	int hours;
	int minutes;
	int seconds;

  public:
	explicit Time(int hh = 0, int mm = 0, int ss = 0)
		: hours(hh), minutes(mm), seconds(ss) { }

  #if SOLUCION

	Time operator+(const Time& other) const
	{
		return Time(hours + other.hours, minutes + other.minutes, seconds + other.seconds);
	}

  #elif OPCIONAL

	Time operator+(const Time& other) const
	{
		int ss = seconds + other.seconds;
		int css = ss / 60;
		int mm = minutes + other.minutes;
		int cmm = (mm + css) / 60;
		int hh = hours + other.hours;
		//int chh = (hh + cmm) / 24;
		return Time((hh + cmm) % 24, (mm + css) % 60, ss % 60);
	}

   #endif

	friend inline std::ostream& operator<<(std::ostream& out, const Time& time)
	{ return out << time.hours << ':' << time.minutes << ':' << time.seconds; }
};

int main()
{
	Time actual(13, 30);
	Time periodo(8);
	Time pildora1 = actual + periodo;
	Time pildora2 = pildora1 + periodo;

	std::cout << "Son las " << actual << std::endl;
	std::cout << "Proxima pildora a las " << pildora1 << std::endl;
	std::cout << "Y la siguiente a las " << pildora2 << std::endl;
}