pizza.py

def slice_pizza(number_of_friends, number_of_slices):
  # Cut pizza in half
  number_of_slices = number_of_slices*2
  
  # Is there enough slices for everybody?
  if number_of_slices >= number_of_friends:
    # If yes - return our slices, it's time to eat pizza!
    return number_of_slices
  else:
    # If not - then cut it in half once again.
    return slice_pizza(number_of_friends, number_of_slices)

  
print(slice_pizza(15, 1))