code: 
  
  
  def   SCREAMING_SNAKE_CASE__						(							)			->							int:
  
  				for a in range(3_0_0	):
  								for b in range(a + 1,	4_0_0	):
  												for c in range(b + 1,	5_0_0	):
  																if (a + b + c) == 1_0_0_0 and (a**2) + (b**2) == (c**2):
  																				return a * b * c
  
  				return -1
  
  
  
  def   SCREAMING_SNAKE_CASE__						(							)			->							int:
  
  				for a in range(3_0_0	):
  								for b in range(4_0_0	):
  												A__     :							Dict   				=1_0_0_0 - a - b
  												if a < b < c and (a**2) + (b**2) == (c**2):
  																return a * b * c
  
  				return -1
  
  
  
  def   SCREAMING_SNAKE_CASE__						(							)			->							None:
  				import timeit
  
  				print(
  				    timeit.timeit('''solution()''',	setup='''from __main__ import solution''',	number=1_0_0_0	)	)
  				print(
  				    timeit.timeit(
  				        '''solution_fast()''',	setup='''from __main__ import solution_fast''',	number=1_0_0_0	)	)
  
  
  if __name__ == "__main__":
  						print(F"{solution() = }")
  
  
  
  
style_context: 
  
  
  def   SCREAMING_SNAKE_CASE__						(							snake_case_	)			->							int:
  				barcode //= 1_0  # exclude the last digit
  				A__     :							List[str]   				=False
  				A__     :							Dict   				=0
  
  				# extract and check each digit
  				while barcode != 0:
  								A__     :							Union[str, Any]   				=1 if checker else 3
  								s += mult * (barcode % 1_0)
  								barcode //= 1_0
  								A__     :							Union[str, Any]   				=not checker
  
  				return (1_0 - (s % 1_0)) % 1_0
  
  
  
  def   SCREAMING_SNAKE_CASE__						(							snake_case_	)			->							bool:
  				return len(str(snake_case_	)	) == 1_3 and get_check_digit(snake_case_	) == barcode % 1_0
  
  
  
  def   SCREAMING_SNAKE_CASE__						(							snake_case_	)			->							int:
  				if str(snake_case_	).isalpha():
  								A__     :							Tuple   				=f'Barcode \'{barcode}\' has alphabetic characters.'
  								raise ValueError(snake_case_	)
  				elif int(snake_case_	) < 0:
  								raise ValueError('''The entered barcode has a negative value. Try again.'''	)
  				else:
  								return int(snake_case_	)
  
  
  if __name__ == "__main__":
  						import doctest
  
  						doctest.testmod()
  						__lowerCamelCase       :       List[Any]				   =			get_barcode(input("Barcode: ").strip())
  
  						if is_valid(barcode):
  												print(F"'{barcode}' is a valid barcode.")
  						else:
  												print(F"'{barcode}' is NOT a valid barcode.")
  
  
  
  