


from __future__ import annotations






def 					UpperCamelCase   (      __magic_name__	:				list[float]	)  ->    float:
		"""simple docstring"""




		lowercase__	     =						0.0_0
		lowercase__	     =						0
		for resistor in resistors:
				if resistor <= 0:
						lowercase__	     =						f'''Resistor at index {index} has a negative or zero value!'''
						raise ValueError(__magic_name__	)
				first_sum += 1 / float(__magic_name__	)
				index += 1
		return 1 / first_sum






def 					UpperCamelCase   (      __magic_name__	:				list[float]	)  ->    float:
		"""simple docstring"""




		lowercase__	     =						0.0_0
		lowercase__	     =						0
		for resistor in resistors:
				sum_r += resistor
				if resistor < 0:
						lowercase__	     =						f'''Resistor at index {index} has a negative value!'''
						raise ValueError(__magic_name__	)
				index += 1
		return sum_r


if __name__ == "__main__":
	import doctest

	doctest.testmod()






from bisect import bisect
from itertools import accumulate







def     UpperCAmelCase_		(					snake_case__    ,			snake_case__    ,			snake_case__    ,			snake_case__					)	->     Optional[int]:



				"""simple docstring"""





				lowerCAmelCase__		  =  sorted(zip(snake_case__    ,			snake_case__					)    ,			key=lambda snake_case__					: x[0] / x[1]    ,			reverse=snake_case__					)
				lowerCAmelCase__  ,   lowerCAmelCase__		  =  [i[0] for i in r], [i[1] for i in r]
				lowerCAmelCase__		  =  list(accumulate(snake_case__					)					)
				lowerCAmelCase__		  =  bisect(snake_case__    ,			snake_case__					)
				return (
				    0
				    if k == 0
				    else sum(vl[:k]					) + (w - acc[k - 1]) * (vl[k]) / (wt[k])
				    if k != n
				    else sum(vl[:k]					)
				)


if __name__ == "__main__":
	import doctest

	doctest.testmod()
