#include <iostream>
#include <mpi.h>

using namespace std;

int main(int argc, char * argv[]) {
    MPI_Init(&argc, &argv);

    int size;
    MPI_Comm_size(MPI_COMM_WORLD, &size);

    int rank;
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);

    cout << "Hello world from " << rank << " of " << size << "!" << endl;

    char buffer[MPI_MAX_PROCESSOR_NAME];
    int len;

    MPI_Get_processor_name(buffer, &len);
    cout << " I am runing on " << buffer << endl;

    MPI_Finalize();
    return 0;

}