
"""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() = }''')






"""simple docstring"""
from .stack import Stack




def     __lowerCamelCase  (		UpperCamelCase__      ):


	"""simple docstring"""






	_UpperCAmelCase =						Stack()
	_UpperCAmelCase =						{"(": ")", "[": "]", "{": "}"}
	for bracket in parentheses:
		if bracket in bracket_pairs:
			stack.push(UpperCamelCase__      )
		elif bracket in (")", "]", "}"):
			if stack.is_empty() or bracket_pairs[stack.pop()] != bracket:
				return False
	return stack.is_empty()


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

			testmod()

			__magic_name__		       =				['''((()))''', '''((())''', '''(()))''']
			print('''Balanced parentheses demonstration:\n''')
			for example in examples:
						__magic_name__		       =				'''''' if balanced_parentheses(example) else '''not '''
						print(f'''{example} is {not_str}balanced''')




