#include <stdio.h>
#include <mpi.h>

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

  int myrank, size;

  MPI_Init(&argc, &argv);
  MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
  MPI_Comm_size(MPI_COMM_WORLD, &size);

  printf("Processor %d of %d: Hello World!\n", myrank, size);

  MPI_Finalize();

}