




def        __UpperCAmelCase						(							lowerCamelCase_ :     int = 10_00  )       ->  int:







			"""simple docstring"""





			return sum(2 * a * ((a - 1) // 2) for a in range(3  ,							n + 1  )  )


if __name__ == "__main__":
						print(solution())









import warnings

from ...utils import logging
from .image_processing_poolformer import PoolFormerImageProcessor


UpperCamelCase__ :   str						=							logging.get_logger(__name__)







class 				lowerCAmelCase_       (					lowerCamelCase_							):






				def __init__(			self      ,*snake_case__      ,**snake_case__ ):
							warnings.warn(
							    'The class PoolFormerFeatureExtractor is deprecated and will be removed in version 5 of Transformers.'
							    ' Please use PoolFormerImageProcessor instead.'      ,snake_case__      ,)
							super().__init__(*snake_case__      ,**snake_case__ )



