code: 
  """simple docstring"""
  from dataclasses import dataclass
  from typing import Callable, Optional
  
  import datasets
  
  
  @dataclass
  class    _lowerCAmelCase						(						datasets.BuilderConfig						):
  							lowercase_     :     Optional[Callable]       =							None
  							lowercase_     :     Optional[dict]       =							None
  							lowercase_     :     Optional[datasets.Features]       =							None
  
  
  
  							def       _a   (      self   )							->							List[Any]:
  								assert self.generator is not None, "generator must be specified"
  
  								if self.gen_kwargs is None:
  									_UpperCAmelCase =						{}
  
  
  
  
  
  class    _lowerCAmelCase						(						datasets.GeneratorBasedBuilder						):
  							lowercase_     :     Any       =							GeneratorConfig
  
  
  
  							def       _a   (      self   )							->							Union[str, Any]:
  								return datasets.DatasetInfo(features=self.config.features   )
  
  
  
  							def       _a   (      self ,						a_   )							->							Optional[int]:
  								return [datasets.SplitGenerator(name=datasets.Split.TRAIN ,						gen_kwargs=self.config.gen_kwargs   )]
  
  
  
  							def       _a   (      self ,						**a_   )							->							int:
  								for idx, ex in enumerate(self.config.generator(**a_   )   ):
  									yield idx, ex
  
  
  
  
  
style_context: 
  """simple docstring"""
  def     __lowerCamelCase  (		UpperCamelCase__ = 400_0000      ):
  
  
  	"""simple docstring"""
  
  
  
  
  
  
  	_UpperCAmelCase =						1
  	_UpperCAmelCase =						2
  	_UpperCAmelCase =						0
  	while j <= n:
  		if j % 2 == 0:
  			total += j
  		_UpperCAmelCase ,      _UpperCAmelCase =						j, i + j
  
  	return total
  
  
  if __name__ == "__main__":
  			print(f'''{solution() = }''')
  
  
  
  
  