text: #include <stdio.h>
  #include <mpi.h>
  
  int main (int argc, char **argv) {
      int rank, size;
      MPI_Init(&argc, &argv);
      MPI_Comm_rank(MPI_COMM_WORLD, &rank);
      MPI_Comm_size(MPI_COMM_WORLD, &size);
      printf("Hello world from process %d of %d\n", rank, size);
      MPI_Finalize();
      return 0;
  }
  
  