code: 
  '''simple docstring'''
  
  
  
  from ..utils import DummyObject, requires_backends
  
  
  
  
  
  class 			A							(       metaclass=__UpperCAmelCase				):
  			lowerCamelCase							:							Optional[Any]       		=  ["""torch""", """librosa"""]
  
  
  
  			def __init__(					self       ,     *lowerCamelCase__       ,     **lowerCamelCase__       )			->		Dict:
  
  
  
  
  									'''simple docstring'''
  
  
  
  									requires_backends(self       ,     ["""torch""", """librosa"""]       )
  
  
  
  			@classmethod
  			def A__ (					cls       ,     *lowerCamelCase__       ,     **lowerCamelCase__       )			->		Dict:
  
  
  
  
  									'''simple docstring'''
  
  
  
  									requires_backends(cls       ,     ["""torch""", """librosa"""]       )
  
  
  
  			@classmethod
  			def A__ (					cls       ,     *lowerCamelCase__       ,     **lowerCamelCase__       )			->		Dict:
  
  
  
  
  									'''simple docstring'''
  
  
  
  									requires_backends(cls       ,     ["""torch""", """librosa"""]       )
  
  
  
  
  
  class 			A							(       metaclass=__UpperCAmelCase				):
  			lowerCamelCase							:							List[Any]       		=  ["""torch""", """librosa"""]
  
  
  
  			def __init__(					self       ,     *lowerCamelCase__       ,     **lowerCamelCase__       )			->		List[str]:
  
  
  
  
  									'''simple docstring'''
  
  
  
  									requires_backends(self       ,     ["""torch""", """librosa"""]       )
  
  
  
  			@classmethod
  			def A__ (					cls       ,     *lowerCamelCase__       ,     **lowerCamelCase__       )			->		Tuple:
  
  
  
  
  									'''simple docstring'''
  
  
  
  									requires_backends(cls       ,     ["""torch""", """librosa"""]       )
  
  
  
  			@classmethod
  			def A__ (					cls       ,     *lowerCamelCase__       ,     **lowerCamelCase__       )			->		Tuple:
  
  
  
  
  									'''simple docstring'''
  
  
  
  									requires_backends(cls       ,     ["""torch""", """librosa"""]       )
  
  
  
  
  
  
  
style_context: 
  '''simple docstring'''
  
  
  
  def  _A		(							lowercase__	):
  
  						# validate:
  						if not isinstance(lowercase__		,		lowercase__	) or not all(
  						    isinstance(lowercase__		,		lowercase__	) and item >= 0 for item in citations	):
  												raise ValueError("""The citations should be a list of non negative integers."""	)
  
  						citations.sort()
  						lowercase__							 =       len(lowercase__	)
  
  						for i in range(lowercase__	):
  												if citations[len_citations - 1 - i] <= i:
  																		return i
  
  						return len_citations
  
  
  if __name__ == "__main__":
  				import doctest
  
  				doctest.testmod()
  
  
  
  
  
  
  