#include <iostream>
#include <mpi.h>

using namespace std;

int main(int argc, char * argv[]) {

   MPI::Init(argc, argv);
   int size{MPI::COMM_WORLD.Get_size()};
   int rank{MPI::COMM_WORLD.Get_rank()};

   cout << "Hello World from " << rank << " of " << size << "!" << endl;

   MPI::Finalize();
   return 0;
}