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

int main(void) {
    int my_rank;
    int comm_sz;

    MPI_Init(NULL, NULL);
    MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
    MPI_Comm_size(MPI_COMM_WORLD, &comm_sz);

    printf("Hello from process %d of %d!\n", my_rank, comm_sz);

    MPI_Finalize();
    return 0;
}