"""simple docstring"""





from __future__ import annotations





def        a_  (   _lowerCAmelCase						:				list[float]  ):





       '''simple docstring'''

       lowercase__    :	str     					=			0.0_0
       lowercase__    :	int     					=			0
       for resistor in resistors:
              if resistor <= 0:
                     lowercase__    :	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        a_  (   _lowerCAmelCase						:				list[float]  ):





       '''simple docstring'''

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


if __name__ == "__main__":
       import doctest

       doctest.testmod()
"""simple docstring"""





import math





def        a_  (   _lowerCAmelCase						:				int = 100  ):





       '''simple docstring'''

       lowercase__    :	Union[str, Any]     					=			sum(i * i for i in range(1     ,				n + 1  )  )
       lowercase__    :	str     					=			int(math.pow(sum(range(1     ,				n + 1  )  )     ,				2  )  )
       return square_of_sum - sum_of_squares


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

