
"""simple docstring"""





def       __a	(						__lowerCamelCase    ):
   if not isinstance(__lowerCamelCase,						__lowerCamelCase    ):
      raise ValueError("Input series is not valid, valid series - [1, 2/3, 2]"    )
   if len(__lowerCamelCase    ) == 0:
      raise ValueError("Input list must be a non empty list"    )
   if len(__lowerCamelCase    ) == 1 and series[0] != 0:
      return True
   UpperCAmelCase_   :   Any     	=       []
   UpperCAmelCase_   :   Optional[Any]     	=       len(__lowerCamelCase    )
   for i in range(0,						__lowerCamelCase    ):
      if series[i] == 0:
         raise ValueError("Input series cannot have 0 as an element"    )
      rec_series.append(1 / series[i]    )
   UpperCAmelCase_   :   str     	=       rec_series[1] - rec_series[0]
   for index in range(2,						__lowerCamelCase    ):
      if rec_series[index] - rec_series[index - 1] != common_diff:
         return False
   return True







def       __a	(						__lowerCamelCase    ):
   if not isinstance(__lowerCamelCase,						__lowerCamelCase    ):
      raise ValueError("Input series is not valid, valid series - [2, 4, 6]"    )
   if len(__lowerCamelCase    ) == 0:
      raise ValueError("Input list must be a non empty list"    )
   UpperCAmelCase_   :   Dict     	=       0
   for val in series:
      answer += 1 / val
   return len(__lowerCamelCase    ) / answer


if __name__ == "__main__":
    import doctest

    doctest.testmod()






def 		snake_case_   (				lowercase__     :    str     ):






				'''simple docstring'''






				_lowerCAmelCase  						=53_81
				for x in s:
								_lowerCAmelCase  						=((hash_value << 5) + hash_value) + ord(lowercase__     )
				return hash_value & 0Xffff_ffff

