#include <iostream>

 #include <lemon/list_graph.h>

 int main()

 {

   typedef lemon::ListGraph Graph;

   typedef Graph::EdgeIt EdgeIt;

   typedef Graph::NodeIt NodeIt;

   using lemon::INVALID;

   Graph g;

   for (int i = 0; i < 3; i++)

     g.addNode();

   for (NodeIt i(g); i!=INVALID; ++i)

     for (NodeIt j(g); j!=INVALID; ++j)

       if (i != j) g.addEdge(i, j);

   std::cout << "Hello World!" << std::endl;

   std::cout <<  std::endl;

   std::cout << "This is library LEMON here! We have a graph!" << std::endl;

   std::cout <<  std::endl;

   std::cout << "Nodes:";

   for (NodeIt i(g); i!=INVALID; ++i)

     std::cout << " " << g.id(i);

   std::cout << std::endl;

   std::cout << "Edges:";

   for (EdgeIt i(g); i!=INVALID; ++i)

     std::cout << " (" << g.id(g.source(i)) << "," << g.id(g.target(i)) << ")";

   std::cout << std::endl;

 }