code: 
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: Tuple      ):
  
  
  
  
  
  
  							"""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_       :   Union[str, Any]			=	1
  							for i in range(lowercase_	,	0	,	-2      ):
  														value *= i
  							return value
  
  
  if __name__ == "__main__":
  			import doctest
  
  			doctest.testmod()
  
  
  
style_context: 
  
  
  def 						_lowerCamelCase		(							SCREAMING_SNAKE_CASE_				: list[int]      ):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  							a_       :   List[Any]			=	len(SCREAMING_SNAKE_CASE_      )
  							if n in (0, 1):
  														return 0
  							return sum(query * (n - i - 1) for i, query in enumerate(sorted(SCREAMING_SNAKE_CASE_      )      )      )
  
  
  if __name__ == "__main__":
  	import doctest
  
  	doctest.testmod()
  
  
  