


from math import log

from scipy.constants import Boltzmann, physical_constants

SCREAMING_SNAKE_CASE__     					=			300  # TEMPERATURE (unit = K)


def     lowercase	(    a     , a     , a     , ):



		'''simple docstring'''




		if donor_conc <= 0:
				raise ValueError("Donor concentration should be positive" )
		elif acceptor_conc <= 0:
				raise ValueError("Acceptor concentration should be positive" )
		elif intrinsic_conc <= 0:
				raise ValueError("Intrinsic concentration should be positive" )
		elif donor_conc <= intrinsic_conc:
				raise ValueError(
				    "Donor concentration should be greater than intrinsic concentration" )
		elif acceptor_conc <= intrinsic_conc:
				raise ValueError(
				    "Acceptor concentration should be greater than intrinsic concentration" )
		else:
				return (
				    Boltzmann
				    * T
				    * log((donor_conc * acceptor_conc) / intrinsic_conc**2 )
				    / physical_constants["electron volt"][0]
				)


if __name__ == "__main__":
		import doctest

		doctest.testmod()










def     lowercase	(    a = 50 ):



		'''simple docstring'''




		SCREAMING_SNAKE_CASE_				:int				     =						[1] * (length + 1)

		for row_length in range(3     , length + 1 ):
				for block_length in range(3     , row_length + 1 ):
						for block_start in range(row_length - block_length ):
								ways_number[row_length] += ways_number[
								    row_length - block_start - block_length - 1
								]

						ways_number[row_length] += 1

		return ways_number[length]


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






