int __fastcall sub_4015C4(_DWORD *a1)
{
  if ( a1 == nullptr )
    return 2;
  if ( *a1 <= 0xFu && sub_4018AC(a1: nullsub_3, a2: 496, a3: a1 + 1) != 0 )
    return 16;
  return 0;
}