def 	__lowerCamelCase							(				__a    : int      ,							__a    : int		)      ->       int:
	return (input_a, input_a).count(0		) % 2

def 	__lowerCamelCase							(				)      ->       None:
	assert xor_gate(0      ,							0		) == 0
	assert xor_gate(0      ,							1		) == 1
	assert xor_gate(1      ,							0		) == 1
	assert xor_gate(1      ,							1		) == 0


if __name__ == "__main__":
						print(xor_gate(0, 0))
						print(xor_gate(0, 1))







from __future__ import annotations





def  _snake_case		(snake_case_					:     str  )							->		bool:
  __UpperCAmelCase	:  int
  __UpperCAmelCase	:  list[str]		=     list(snake_case_  )
  __UpperCAmelCase,			__UpperCAmelCase	:  Any		=     _vector[:-1], int(_vector[-1]  )
  __UpperCAmelCase	:  list[int]		=     [int(snake_case_  ) for digit in __vector]

  vector.reverse()
  for i, digit in enumerate(snake_case_  ):
    if i & 1 == 0:
      __UpperCAmelCase	:  int		=     digit * 2
      if doubled > 9:
        doubled -= 9
      check_digit += doubled
    else:
      check_digit += digit

  return check_digit % 10 == 0


if __name__ == "__main__":
      import doctest

      doctest.testmod()
      assert is_luhn('''79927398713''')
      assert not is_luhn('''79927398714''')





