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

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

    MPI_Init(&argc,&argv);
    MPI_Comm_size(MPI_COMM_WORLD,&numprocs);
    MPI_Comm_rank(MPI_COMM_WORLD,&myid);

    fprintf(stderr,"Hello World! I am rank  %d of size %d\n", myid, numprocs);

    MPI_Finalize();
}