#include <mpi.h>

int main(int argc, char* argv[]) {
	int rank, nprocs;
	MPI_Init(&argc, &argv);
	MPI_Comm_rank(MPI_COMM_WORLD, &rank);
	MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
	char s[30];
	gethostname(s, 30);
	printf("Hello world from: host@process_rank = %s@%d \n", s, rank);
	MPI_Finalize();
	return 0;
}