




'''simple docstring'''


def 						lowerCamelCase__   (				a							):
						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 						lowerCamelCase__   (				a							):
						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 						lowerCamelCase__   (				a							):
						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(a							)
												else:
																		__snake_case						 =   [pos]
												__snake_case						 =   head.next
												pos += 1
						__snake_case						 =   pos - 1
						__snake_case						 =   0
						for v in d.values():
												if len(a							) % 2 != 0:
																		middle += 1
												else:
																		__snake_case						 =   0
																		for i in range(0    ,	len(a							)							):
																								if v[i] + v[len(a							) - 1 - step] != checksum:
																														return False
																								step += 1
												if middle > 1:
																		return False
						return True







'''simple docstring'''


from .configuration_bert_masked import MaskedBertConfig
from .modeling_bert_masked import (
    MaskedBertForMultipleChoice,
    MaskedBertForQuestionAnswering,
    MaskedBertForSequenceClassification,
    MaskedBertForTokenClassification,
    MaskedBertModel,
)
from .modules import *

