






'''simple docstring'''







def 			__UpperCamelCase				(			lowercase_					:     int      ):
       """simple docstring"""




       if not isinstance(lowercase_      ,					lowercase_      ):
              raise ValueError('double_factorial() only accepts integral values'      )
       if num < 0:
              raise ValueError('double_factorial() not defined for negative values'      )
       a_	    = 1
       for i in range(lowercase_      ,					0      ,					-2      ):
              value *= i
       return value


if __name__ == "__main__":
  import doctest

  doctest.testmod()












'''simple docstring'''







def 			__UpperCamelCase				(			lowercase_					:     int      ,					lowercase_					:     int      ):
       """simple docstring"""




       return (input_a, input_a).count(0      ) % 2


def 			__UpperCamelCase				(			):
       """simple docstring"""




       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))




