class graf
{

public:
    int ma[50][50], m, viz[51];
    int n;
    graf();
    ~graf();
    graf(unsigned);
    void citire_fisier(std::string);
    void citire_tastatura();
    void afisare();
    void set_m();
    void set_n(int);
    int get_i_j(int,int);
    void set_i_j(int, int);
    inline int get_n() // FUNCTIA INLINE , ce ajuta la timpul de executare
    {
        return n;
    }
    int get_m();
    void lista_adiacenta(int);
    int complementar(graf);
    void ma_lant();
    int m_lant(graf&);
    friend graf operator-(graf, int);
    friend graf operator~(graf);
    friend std::ostream& operator<<(std::ostream& out,const graf& g);
    friend std::istream& operator >>(std::istream& in, graf &g);
    friend graf operator-(graf, int);




};