/*

 int main()

 struct isVis_map {};

 bool Get(isVis_map p,TestGraph::NodeIterator i) { return i->isVis;}

 void Set(isVis_map p,TestGraph::NodeIterator i,bool b) {  i->isVis=b;}

 */

 class my_bfs_maps

 {

 public:

   //isVis_map visited;  //node->bool (RW)

   class_element_map<TestGraph::NodeIterator,

 		    TestGraph::NodeType,

 		    bool,

 		    &NodeData::isVis> visited;

   struct _tree_map_t {

     typedef TestGraph::EdgeIterator value_type;

     void Set(const TestGraph::NodeIterator &n,const value_type &t)

     {

       cout << t.From()->id << "->" << t.To()->id << '\n';

     }

   } tree;

   do_nothing_map dist;   //node->int (W)

   do_nothing_map priority; //node->int (W)

   //priority_map priority; //node->int (W)

 };

 class IGraph 

 {

 public:

   //  struct NodeType {bfs_node_data<TestGraph> bfs;};

   struct NodeType {bool isVis;};

   vector<NodeType> nodes;

   class NodeIterator 

   {

   public:

     IGraph *G;

     int n;

     NodeIterator &operator ++() { n++; return *this;}

     NodeType &operator *() const { return G->nodes[n];}

     NodeType *operator ->() const { return &(G->nodes[n]);}

     bool isValid() const {return n<=5000;}

     int Index() {return n;} //csak a kiirashoz kell

   };

   void GetFirst(NodeIterator &i) {i.G=this;i.n=1;}

   class OutEdgeIterator 

   {    

   public:

     IGraph *G;

     int f,t;

     int gcd() { int a=f;int b=t;int c;while(c=a%b) {a=b;b=c;} ; return b;}

     OutEdgeIterator &operator ++() {while(++t<=5000&&gcd()==1);return *this;}

     bool isValid() const {return t<=5000;}

     NodeIterator From() const {NodeIterator i; i.G=G;i.n=f;return i;}

     NodeIterator To() const {NodeIterator i; i.G=G;i.n=t;return i;}

     NodeIterator Anode() const {return From();}

     NodeIterator Bnode() const {return To();}

   };

   typedef OutEdgeIterator EdgeIterator;

   void GetFirst(OutEdgeIterator &i,const NodeIterator &n)

   {i.G=this;i.f=n.n;i.t=0;++i;}

   IGraph() : nodes(5000) {}

 };

 class IMaps_t

 {

 public:

 //     class_element_map<IGraph::NodeIterator,

 //   		    IGraph::NodeType,

 //   		    bool,

 //   		    &IGraph::NodeType::isVis> visited;

   struct _visited_map_t {

     typedef bool value_type;

     void Set(const IGraph::NodeIterator &n,const value_type &t) { n->isVis=t; }

     value_type Get(const IGraph::NodeIterator &n) const { return n->isVis; }

   } visited;

   struct _tree_map_t {

     typedef IGraph::EdgeIterator value_type;

     void Set(const IGraph::NodeIterator &n,const value_type &t)

     { cout << t.From().Index() << "->" << t.To().Index() << '\n'; }

   } tree;

   do_nothing_map dist;   //node->int (W)

   do_nothing_map priority; //node->int (W)

 };

 void main()

   TestGraph::NodeIterator n,m,o,p,q;

   TestGraph::NodeIterator n,m;

   TestGraph::OutEdgeIterator e,f,g,h;

   TestGraph::OutEdgeIterator e;

   int i,j,k;

   int i;

   for(n=G.First();n.isValid();++n)

   for(n=G.First();n.isValid();++n) //Demo

 	if((e->id)%2) G.Delete(e++);

 	if((e->id)%2) G.Delete(e++);  //it may be nice to have a postfix ++

   n=G.First();

   // For Marci's sake

   //G.Clean();

   cout << "\n\n\n BFS \n\n\n";

   //my_bfs_maps Maps;

   //  bfs_static_maps<TestGraph> Maps(&NodeData::bfs);

   /// bfs(G,n,Maps);

   {

     G.Clean();

   cout << '\n';

     for(int i=1;i<=10;i++) G.AddNode()->id=i;

   IGraph IG;

   IMaps_t IMaps;

     {  //I would'n say I'm really happy with this.

   IGraph::NodeIterator in;

       int i;

   IG.GetFirst(in);

       for(TestGraph::NodeIterator n(G);n.isValid();n++)

   ++in;

 	for(TestGraph::NodeIterator m(G);m.isValid();++m)

   bfs(IG,in,IMaps);

 	  if(n!=m) G.AddEdge(n,m)->id=++i;

     }

     for(TestGraph::NodeIterator n(G);n.isValid();++n) //Demo

       {

 	TestGraph::OutEdgeIterator e(G,n);

 	while(e.isValid())

 	  if((e->id)%2) G.Delete(e++);  //it may be nice to have a postfix ++

 	  else ++e;

       }

     for(TestGraph::AllEdgeIterator a(G);a.isValid();++a)

       cout << a->id << ": " << a.From()->id << "->" << a.To()->id << "   ";

     cout << "\n\n\n";

     for(TestGraph::NodeIterator n(G);n.isValid();++n)

       {

 	cout << n->id << "->";

 	for(TestGraph::OutEdgeIterator e(G,n);e.isValid();++e)

 	  cout << e->id << ":" << e.To()->id << ' ';

 	cout << '\n';

       }

   }