enum Star {
	One = 128,
	Two = 256,
	Three = 512,
	Four = 1024,
	Five = 2048,
};

class Player {
protected:
	int ID;
	short points;
	Star star;

public:
	Player() {
		ID = 0;
		points = 0;
		star = One;
	}
	virtual bool levelUp() {
		bool can = star < Five && points >= (star << 1);
		if (can) {
			star = (Star)(star << 1);
			points -= star;
		}
		return can;
	}
};