class densitate_pixeli{
public:
	virtual int densitate()=0;
};

class display:public densitate_pixeli{
private:
	float latime;
	float inaltime;
	float diagonala;
public:
	float get_latime(){
		return latime;
	}
	float get_inaltime(){
		return inaltime;
	}
	int get_diagonala(){
		return diagonala;
	}
	void set_latime(float val){
		latime=val;
	}
	void set_inaltime(float val){
		inaltime=val;
	}
	void set_diagonala(float val){
		diagonala=val;
	}
	virtual int densitate(){
		return sqrt(latime*latime+inaltime*inaltime)/diagonala;
	}
};