#include <stdio.h>
#include <omp.h>

int main (int argc, char *argv[])
{
  int ts; sscanf (argv[1], "%d", &ts);
  printf ("Hello world:");
  #pragma omp parallel num_threads(ts)
    printf (" %d", omp_get_thread_num ());
  printf ("\n");
  return 0;
}