






def 			lowerCAmelCase_  (						_lowercase       :     int)							-> bool:







			"""simple docstring"""
			a__     :		Any		 =						9

			while num > 0:
						if num % 10 != digit:
									return False
						num //= 100
						digit -= 1

			return True

def 			lowerCAmelCase_  (						)							-> int:







			"""simple docstring"""
			a__     :		Dict		 =						1_3890_2663

			while not is_square_form(num * num):
						if num % 10 == 3:
									num -= 6  # (3 - 6) % 10 = 7
						else:
									num -= 4  # (7 - 4) % 10 = 3

			return num * 10


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









def 			lowerCAmelCase_  (						_lowercase       :     list)							-> bool:







			"""simple docstring"""
			if not isinstance(_lowercase		,     _lowercase):
						raise ValueError("""Input series is not valid, valid series - [1, 2/3, 2]""")
			if len(_lowercase) == 0:
						raise ValueError("""Input list must be a non empty list""")
			if len(_lowercase) == 1 and series[0] != 0:
						return True
			a__     :		Tuple		 =						[]
			a__     :		Union[str, Any]		 =						len(_lowercase)
			for i in range(0		,     _lowercase):
						if series[i] == 0:
									raise ValueError("""Input series cannot have 0 as an element""")
						rec_series.append(1 / series[i])
			a__     :		Dict		 =						rec_series[1] - rec_series[0]
			for index in range(2		,     _lowercase):
						if rec_series[index] - rec_series[index - 1] != common_diff:
									return False
			return True

def 			lowerCAmelCase_  (						_lowercase       :     list)							-> float:







			"""simple docstring"""
			if not isinstance(_lowercase		,     _lowercase):
						raise ValueError("""Input series is not valid, valid series - [2, 4, 6]""")
			if len(_lowercase) == 0:
						raise ValueError("""Input list must be a non empty list""")
			a__     :		Optional[Any]		 =						0
			for val in series:
						answer += 1 / val
			return len(_lowercase) / answer


if __name__ == "__main__":
		import doctest

		doctest.testmod()




