class Vector2D
{
private:
	int x, y;
public:
	Vector2D(int x, int y)
	{
		this->x = x;
		this->y = y;
	}
	int getX() const
	{
		return x;
	}
	int getY() const
	{
		return y;
	}
	bool operator == (const Vector2D &v2) const
	{
		return (v2.x == x) && (v2.y == y);
	}
	bool operator != (const Vector2D &v) const
	{
		return !(*this == v);
	}
	Vector2D operator + (const Vector2D &v) const
	{
		Vector2D r(x + v.getX(), y + v.getY());
		return r;
	}
};

std::ostream& operator<<(std::ostream &os, const Vector2D &v)
{
	os << "(" << v.getX() << "; " << v.getY() << ")";
	return os;
}