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   202       friend class InEdgeIt;  | 
   202       friend class InEdgeIt;  | 
   203       friend class SymEdge;  | 
   203       friend class SymEdge;  | 
   204   | 
   204   | 
   205     protected:  | 
   205     protected:  | 
   206       int n;  | 
   206       int n;  | 
   207       friend int SmartGraph::id(Node v) const;   | 
   207       friend int SmartGraph::id(Node v);   | 
   208       Node(int nn) {n=nn;} | 
   208       Node(int nn) {n=nn;} | 
   209     public:  | 
   209     public:  | 
   210       Node() {} | 
   210       Node() {} | 
   211       Node (Invalid) { n=-1; } | 
   211       Node (Invalid) { n=-1; } | 
   212       bool operator==(const Node i) const {return n==i.n;} | 
   212       bool operator==(const Node i) const {return n==i.n;} | 
   233         | 
   233         | 
   234       friend class Node;  | 
   234       friend class Node;  | 
   235       friend class NodeIt;  | 
   235       friend class NodeIt;  | 
   236     protected:  | 
   236     protected:  | 
   237       int n;  | 
   237       int n;  | 
   238       friend int SmartGraph::id(Edge e) const;  | 
   238       friend int SmartGraph::id(Edge e);  | 
   239   | 
   239   | 
   240     public:  | 
   240     public:  | 
   241       /// An Edge with id \c n.  | 
   241       /// An Edge with id \c n.  | 
   242   | 
   242   | 
   243       /// \bug It should be  | 
   243       /// \bug It should be  |