switch.cc

int mystery(int n)
{
  int i = 1;

  switch (n)
  {
    case 8: i*=2;  case 7: i*=2;
    case 6: i*=2;  case 5: i*=2;
    case 4: i*=2;  case 3: i*=2;
    case 2: i*=2;  case 1: i*=2;
  }

  return i;
}