
from __future__ import annotations

__a  			=					1.6021E-19  # units = C




def 				a						(							snake_case__:					float						,   snake_case__:					float						,   snake_case__:					float						,   ):


				'''simple docstring'''
				if (conductivity, electron_conc, mobility).count(0					) != 1:
								raise ValueError('''You cannot supply more or less than 2 values'''					)
				elif conductivity < 0:
								raise ValueError('''Conductivity cannot be negative'''					)
				elif electron_conc < 0:
								raise ValueError('''Electron concentration cannot be negative'''					)
				elif mobility < 0:
								raise ValueError('''mobility cannot be negative'''					)
				elif conductivity == 0:
								return (
								    "conductivity",
								    mobility * electron_conc * ELECTRON_CHARGE,
								)
				elif electron_conc == 0:
								return (
								    "electron_conc",
								    conductivity / (mobility * ELECTRON_CHARGE),
								)
				else:
								return (
								    "mobility",
								    conductivity / (electron_conc * ELECTRON_CHARGE),
								)


if __name__ == "__main__":
						import doctest

						doctest.testmod()






def 				a						(							snake_case__:					list						,   snake_case__:					list						,   snake_case__:					int						,   snake_case__:					int						,   snake_case__:					int					):


				'''simple docstring'''
				if index == number_of_items:
								return 0
				lowercase_       =					0
				lowercase_       =					0
				lowercase_       =					knapsack(snake_case__						,   snake_case__						,   snake_case__						,   snake_case__						,   index + 1					)
				if weights[index] <= max_weight:
								lowercase_       =					values[index] + knapsack(
								    snake_case__						,   snake_case__						,   snake_case__						,   max_weight - weights[index]						,   index + 1					)
				return max(snake_case__						,   snake_case__					)


if __name__ == "__main__":
						import doctest

						doctest.testmod()




