#include <boost/mpi.hpp>
#include <iostream>
#include <string>
#include <boost/serialization/string.hpp>

namespace mpi = boost::mpi;

using namespace std;

int main()
{
  mpi::environment env;
  mpi::communicator world;

  string msg;

  if (world.rank() == 0) {
    world.send(1, 0, string("Hello"));
    world.recv(1, 1, msg);
    cout << msg << "!" << endl;
  } else {
    world.recv(0, 0, msg);
    cout << "Proc 1 Got "  << msg << endl;
    world.send(0, 1, string(msg+" world"));
  }

  return 0;
}