#include <iostream>

using namespace std;

class SpacePort
{
public:
	SpacePort(unsigned int size);
	bool requestLanding(unsigned int dockNumber);
	bool requestTakeoff(unsigned int  dockNumber);
private:
	bool num[100];
	unsigned int size;
};

SpacePort::SpacePort(unsigned int size)
{
	this->size = size;
	for (unsigned int i = 0; i < size; i++)
	{
		this->num[i] = 0;
	}
}

bool SpacePort::requestLanding(unsigned int dockNumber)
{
	if (dockNumber >= this->size|| this->num[dockNumber] ==1||dockNumber<0)
	{
		return 0;
	}
	else
	{
		this->num[dockNumber] = 1;
		return 1;
	}
}

bool SpacePort::requestTakeoff(unsigned int dockNumber)
{
	if (dockNumber >= this->size || this->num[dockNumber] == 0 || dockNumber < 0)
	{
		return 0;
	}
	else
	{
		this->num[dockNumber] = 0;
		return 1;
	}
}

int main()
{
	SpacePort s(5);
	cout << boolalpha << s.requestLanding(0) << endl;
	cout << boolalpha << s.requestLanding(4) << endl;
	cout << boolalpha << s.requestLanding(5) << endl;

	cout << boolalpha << s.requestTakeoff(0) << endl;
	cout << boolalpha << s.requestTakeoff(4) << endl;
	cout << boolalpha << s.requestTakeoff(5) << endl;
	return 0;
}