static bool cmp(const Cluster *c1, const Cluster *c2){return c1->value() > c2->value(); }

private :
        struct Cluster
         {
           private :
            int value_;
            QSet<int> numbersOfItems_;
            QPoint centerPos;
            bool isPainted;
           public :
            Cluster();
            Cluster(int item1 ,int item2, int nValue);
            Cluster(int item1, int nValue);
            void setValue(int newValue);
            int value(){ return value_; }
            QSet<int> &numbersOfItems() {return numbersOfItems_;}
            void setPainted(bool is);
            QString toString(QStringList * lst);
            void append(Cluster * nClust);
          };

 public :
        bool cmp(const Cluster&  c1, const Cluster& c2){return c1.value() > c2.value();}

QVector <Cluster * > bufvec;

        
qSort(bufvec.begin(),bufvec.end(), cmp);