"""simple docstring"""




def 							SCREAMING_SNAKE_CASE					(      _lowerCamelCase						:	str      ,_lowerCamelCase						:	list[str]     )	->				str:
  _lowerCAmelCase						:	Any        =					""""""
  for word_or_phrase in separated:
    if not isinstance(_lowerCamelCase      ,_lowerCamelCase     ):
      raise Exception("""join() accepts only strings to be joined"""     )
    joined += word_or_phrase + separator
  return joined.strip(_lowerCamelCase     )


if __name__ == "__main__":
     from doctest import testmod

     testmod()





"""simple docstring"""




def 							SCREAMING_SNAKE_CASE					(      _lowerCamelCase						:	int = 100     )	->				int:
  _lowerCAmelCase						:	Optional[Any]        =					n * (n + 1) * (2 * n + 1) / 6
  _lowerCAmelCase						:	Tuple        =					(n * (n + 1) / 2) ** 2
  return int(square_of_sum - sum_of_squares     )


if __name__ == "__main__":
     print(F"""{solution() = }""")




