/// the given standard container.

       /// an STL container through the given output iterator. The

       /// <tt>value_type</tt> of the container must be <tt>FullGraph::Node</tt>.

       /// For example,

       /// \code

       /// std::vector<FullGraph::Node> nodes(countNodes(graph));

       /// tsp.tourNodes(nodes.begin());

       /// \endcode

       /// or

       /// \code

       /// std::list<FullGraph::Node> nodes;

       /// tsp.tourNodes(std::back_inserter(nodes));

       /// \endcode

       template <typename Container>

       template <typename Iterator>

       void tourNodes(Container &container) const {

       void tourNodes(Iterator out) const {

         container.assign(_tour.begin(), _tour.end());

         std::copy(_tour.begin(), _tour.end(), out);