/*
https://cdn.discordapp.com/attachments/654482101256585216/654495688771764224/image0.png
*/

#include <iostream>
#include <vector>

class Appointment
{
	std::string description;

protected:
	int year = -1;
	int month = -1;
	int day = -1;

public:
	virtual bool occurs_on(int year, int month, int day) = 0;

	std::string getDescription()
	{
		return description;
	}

	Appointment(const std::string& description, int year, int month, int day) :
		description(description),
		year(year),
		month(month),
		day(day)
	{}
};

class Onetime : public Appointment
{
	bool occurs_on(int year, int month, int day)
	{
		return this->year == year && this->month == month && this->day == day;
	}

public:
	Onetime(const std::string& description, int year, int month, int day) :
		Appointment(description, year, month, day)
	{}
};

class Daily : public Appointment
{
	bool occurs_on(int year, int month, int day)
	{
		return true;
	}

public:
	Daily(const std::string& description) :
		Appointment(description, -1, -1, -1)
	{}
};

class Weekly : public Appointment
{
	bool occurs_on(int year, int month, int day)
	{
		return (this->day % 7) == (day % 7);
	}

public:
	Weekly(const std::string& description, int day) :
		Appointment(description, -1, -1, day)
	{}
};

class Monthly : public Appointment
{
	bool occurs_on(int year, int month, int day)
	{
		return this->day == day;
	}

public:
	Monthly(const std::string& description, int day) :
		Appointment(description, -1, month, day)
	{}
};

int main()
{
	int year;
	int month;
	int day;

	std::cout << "Year: ";
	std::cin >> year;

	std::cout << "Month: ";
	std::cin >> month;

	std::cout << "Day: ";
	std::cin >> day;

	std::vector<Appointment*> appointments
	{
		new Daily("Daily appointment #1"),
		new Daily("Daily appointment #2"),
		new Weekly("Weekly appointment #1", 3),
		new Weekly("Weekly appointment #2", 4),
		new Monthly("Monthly appointment #1", 8),
		new Onetime("Onetime appointment #1", 2019, 12, 24)
	};

	for (Appointment* appointment : appointments)
	{
		if (appointment->occurs_on(year, month, day))
			std::cout << appointment->getDescription() << std::endl;

		delete appointment;
	}

	appointments.clear();
}