
def    a      ( a	)     ->List[str]:




			'''simple docstring'''


			SCREAMING_SNAKE_CASE     						= []
			SCREAMING_SNAKE_CASE     						= set({'''(''', '''[''', '''{'''}	)
			SCREAMING_SNAKE_CASE     						= set({''')''', ''']''', '''}'''}	)
			SCREAMING_SNAKE_CASE     						= {'''{''': '''}''', '''[''': ''']''', '''(''': ''')'''}

			for i in range(len(a	)	):
						if s[i] in open_brackets:
									stack.append(s[i]	)

						elif s[i] in closed_brackets and (
						    len(a	) == 0 or (len(a	) > 0 and open_to_closed[stack.pop()] != s[i])
						):
									return False

			return len(a	) == 0


def    a      ( )     ->Optional[int]:




			'''simple docstring'''


			SCREAMING_SNAKE_CASE     						= input('''Enter sequence of brackets: '''	)
			if is_balanced(a	):
						print(a		,						'''is balanced'''	)
			else:
						print(a		,						'''is not balanced'''	)


if __name__ == "__main__":
							main()

from __future__ import annotations


def    a      ( a	)     ->float:




			'''simple docstring'''


			SCREAMING_SNAKE_CASE     						= 0.00
			SCREAMING_SNAKE_CASE     						= 0
			for resistor in resistors:
						if resistor <= 0:
									SCREAMING_SNAKE_CASE     						= F"""Resistor at index {index} has a negative or zero value!"""
									raise ValueError(a	)
						first_sum += 1 / float(a	)
						index += 1
			return 1 / first_sum


def    a      ( a	)     ->float:




			'''simple docstring'''


			SCREAMING_SNAKE_CASE     						= 0.00
			SCREAMING_SNAKE_CASE     						= 0
			for resistor in resistors:
						sum_r += resistor
						if resistor < 0:
									SCREAMING_SNAKE_CASE     						= F"""Resistor at index {index} has a negative value!"""
									raise ValueError(a	)
						index += 1
			return sum_r


if __name__ == "__main__":
							import doctest

							doctest.testmod()