pbgl remove vertex

#include <boost/graph/use_mpi.hpp>
#include <boost/graph/distributed/adjacency_list.hpp>
#include <boost/graph/distributed/mpi_process_group.hpp>

// METIS Input
#include <boost/graph/metis.hpp>
#include <boost/graph/distributed/graphviz.hpp>

//#include <cstring>

using namespace boost;
using boost::graph::distributed::mpi_process_group;

int main(int argc, char* argv[])
{
  mpi::environment env(argc, argv);

  typedef adjacency_list<vecS,
                         distributedS<mpi_process_group, vecS>,
                         undirectedS,
                         property<vertex_centrality_t,float>,
                         property<edge_weight_t, int> > Graph;

  const char* filename = "weighted_graph.gr";

  std::ifstream in(filename);
  graph::metis_reader reader(in);

  Graph g(reader.begin(), reader.end(), reader.weight_begin(),
          reader.num_vertices());


    //clear edges and remove first vertex
    boost::graph_traits<Graph>::vertex_descriptor v = vertex(0,g);

    if(owner(v) == process_id(process_group(g)))
    {
        clear_vertex(v,g);
    }

    synchronize(g);

    if(owner(v) == process_id(process_group(g)))
    {
        remove_vertex(v,g);
    }
    synchronize(g);

  // Output a Graphviz DOT file
  std::string outfile = filename;
    size_t i = outfile.rfind('.');
    if (i != std::string::npos)
        outfile.erase(outfile.begin() + i, outfile.end());
    outfile += "-dijkstra-2.dot";

  if (process_id(process_group(g)) == 0) {
     int pcount = num_processes(process_group(g));
    std::cout << "Writing GraphViz output to " << outfile << "..." << pcount << "... ";
    std::cout.flush();
  }
  write_graphviz(outfile, g,
                 make_label_writer(get(vertex_index, g)),
                 make_label_writer(get(edge_weight, g)));
  if (process_id(process_group(g)) == 0)
    std::cout << "Done." << std::endl;

    return 0;
}