
def a(lowercase__	):





	'''simple docstring'''
	if not head:
		return True
	# split the list to two parts
	snake_case_		,       snake_case_      		= head.next, head
	while fast and fast.next:
		snake_case_      		= fast.next.next
		snake_case_      		= slow.next
	snake_case_      		= slow.next
	snake_case_      		= None  # Don't forget here! But forget still works!
	# reverse the second part
	snake_case_      		= None
	while second:
		snake_case_      		= second.next
		snake_case_      		= node
		snake_case_      		= second
		snake_case_      		= nxt
	# compare two parts
	# second part has the same or one less node
	while node:
		if node.val != head.val:
			return False
		snake_case_      		= node.next
		snake_case_      		= head.next
	return True





def a(lowercase__	):





	'''simple docstring'''
	if not head or not head.next:
		return True

	# 1. Get the midpoint (slow)
	snake_case_      		= snake_case_      		= snake_case_      		= head
	while fast and fast.next:
		snake_case_		,       snake_case_      		= fast.next.next, slow.next

	# 2. Push the second half into the stack
	snake_case_      		= [slow.val]
	while slow.next:
		snake_case_      		= slow.next
		stack.append(slow.val	)

	# 3. Comparison
	while stack:
		if stack.pop() != cur.val:
			return False
		snake_case_      		= cur.next

	return True






def a(lowercase__	):





	'''simple docstring'''
	if not head or not head.next:
		return True
	snake_case_      		= {}
	snake_case_      		= 0
	while head:
		if head.val in d:
			d[head.val].append(lowercase__	)
		else:
			snake_case_      		= [pos]
		snake_case_      		= head.next
		pos += 1
	snake_case_      		= pos - 1
	snake_case_      		= 0
	for v in d.values():
		if len(lowercase__	) % 2 != 0:
			middle += 1
		else:
			snake_case_      		= 0
			for i in range(0			, len(lowercase__	)	):
				if v[i] + v[len(lowercase__	) - 1 - step] != checksum:
					return False
				step += 1
		if middle > 1:
			return False
	return True



from ..utils import DummyObject, requires_backends


class SCREAMING_SNAKE_CASE  (		metaclass=__snake_case							):






			"""simple docstring"""




			__A						  =  ["""torch""", """transformers""", """onnx"""]


			def __init__(    self ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(self ,				['torch', 'transformers', 'onnx']							)


			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







class SCREAMING_SNAKE_CASE  (		metaclass=__snake_case							):






			"""simple docstring"""




			__A						  =  ["""torch""", """transformers""", """onnx"""]


			def __init__(    self ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(self ,				['torch', 'transformers', 'onnx']							)


			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







class SCREAMING_SNAKE_CASE  (		metaclass=__snake_case							):






			"""simple docstring"""




			__A						  =  ["""torch""", """transformers""", """onnx"""]


			def __init__(    self ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(self ,				['torch', 'transformers', 'onnx']							)


			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







class SCREAMING_SNAKE_CASE  (		metaclass=__snake_case							):






			"""simple docstring"""




			__A						  =  ["""torch""", """transformers""", """onnx"""]


			def __init__(    self ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(self ,				['torch', 'transformers', 'onnx']							)


			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







class SCREAMING_SNAKE_CASE  (		metaclass=__snake_case							):






			"""simple docstring"""




			__A						  =  ["""torch""", """transformers""", """onnx"""]


			def __init__(    self ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(self ,				['torch', 'transformers', 'onnx']							)


			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







class SCREAMING_SNAKE_CASE  (		metaclass=__snake_case							):






			"""simple docstring"""




			__A						  =  ["""torch""", """transformers""", """onnx"""]


			def __init__(    self ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(self ,				['torch', 'transformers', 'onnx']							)


			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)







			@classmethod
			def 			__lowerCAmelCase (    cls ,				*__UpperCamelCase ,				**__UpperCamelCase							):

				"""simple docstring"""


				requires_backends(cls ,				['torch', 'transformers', 'onnx']							)
