from __future__ import annotations






def 							UpperCAmelCase__(					__UpperCAmelCase			:     list[float]       ):
   __snake_case   :			Tuple										=						0.00
   __snake_case   :			Tuple										=						0
   for resistor in resistors:
      if resistor <= 0:
         __snake_case   :			Optional[Any]										=						F"""Resistor at index {index} has a negative or zero value!"""
         raise ValueError(lowerCamelCase_       )
      first_sum += 1 / float(lowerCamelCase_       )
      index += 1
   return 1 / first_sum






def 							UpperCAmelCase__(					__UpperCAmelCase			:     list[float]       ):
   __snake_case   :			Dict										=						0.00
   __snake_case   :			Union[str, Any]										=						0
   for resistor in resistors:
      sum_r += resistor
      if resistor < 0:
         __snake_case   :			Union[str, Any]										=						F"""Resistor at index {index} has a negative value!"""
         raise ValueError(lowerCamelCase_       )
      index += 1
   return sum_r


if __name__ == "__main__":
 import doctest

 doctest.testmod()









from __future__ import annotations





def        __UpperCAmelCase						(							lowerCamelCase_ :     list[float]  )       ->  float:







			"""simple docstring"""





			SCREAMING_SNAKE_CASE_   : Tuple					  =      0.0_0
			SCREAMING_SNAKE_CASE_   : Tuple					  =      0
			for resistor in resistors:
						if resistor <= 0:
									SCREAMING_SNAKE_CASE_   : Optional[Any]					  =      F'Resistor at index {index} has a negative or zero value!'
									raise ValueError(lowerCamelCase_  )
						first_sum += 1 / float(lowerCamelCase_  )
						index += 1
			return 1 / first_sum





def        __UpperCAmelCase						(							lowerCamelCase_ :     list[float]  )       ->  float:







			"""simple docstring"""





			SCREAMING_SNAKE_CASE_   : Dict					  =      0.0_0
			SCREAMING_SNAKE_CASE_   : Union[str, Any]					  =      0
			for resistor in resistors:
						sum_r += resistor
						if resistor < 0:
									SCREAMING_SNAKE_CASE_   : Union[str, Any]					  =      F'Resistor at index {index} has a negative value!'
									raise ValueError(lowerCamelCase_  )
						index += 1
			return sum_r


if __name__ == "__main__":
						import doctest

						doctest.testmod()



