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

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

    int ret[] = {0, 0, 0};
    MPI_Dims_create(1000000, 3, ret);
    std::cout << ret[0] << ", " << ret[1] << ", " << ret[2] << "\n";

    MPI_Finalize();
    return 0;
}