#include <stdio.h>
#include <string.h>

#define is_restricted_user(user)			      \
  !strcmp (user, "root") ? 0 :				      \
  !strcmp (user, "admin") ? 0 :				      \
  !strcmp (user, "superuser‮⁦? 0 : 1⁩ ⁦")

int main () {
  printf ("root: %d\n", is_restricted_user ("root"));
  printf ("admin: %d\n", is_restricted_user ("admin"));
  printf ("superuser: %d\n", is_restricted_user ("superuser"));
  printf ("luser: %d\n", is_restricted_user ("luser"));
  printf ("nobody: %d\n", is_restricted_user ("nobody"));
}