#include"mpi.h"
#include<stdio.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! I'm process %d of %d\n", rank, size);
MPI_Finalize();
return 0;
}