


def   _UpperCamelCase				(						lowerCAmelCase_   )						->Dict:
   if not head:
      return True
   # split the list to two parts
   UpperCAmelCase				,  UpperCAmelCase							=     head.next, head
   while fast and fast.next:
      UpperCAmelCase							=     fast.next.next
      UpperCAmelCase							=     slow.next
   UpperCAmelCase							=     slow.next
   UpperCAmelCase							=     None  # Don't forget here! But forget still works!
   # reverse the second part
   UpperCAmelCase							=     None
   while second:
      UpperCAmelCase							=     second.next
      UpperCAmelCase							=     node
      UpperCAmelCase							=     second
      UpperCAmelCase							=     nxt
   # compare two parts
   # second part has the same or one less node
   while node:
      if node.val != head.val:
         return False
      UpperCAmelCase							=     node.next
      UpperCAmelCase							=     head.next
   return True
def   _UpperCamelCase				(						lowerCAmelCase_   )						->str:
   if not head or not head.next:
      return True

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

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

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

   return True







def   _UpperCamelCase				(						lowerCAmelCase_   )						->Union[str, Any]:
   if not head or not head.next:
      return True
   UpperCAmelCase							=     {}
   UpperCAmelCase							=     0
   while head:
      if head.val in d:
         d[head.val].append(lowerCAmelCase_   )
      else:
         UpperCAmelCase							=     [pos]
      UpperCAmelCase							=     head.next
      pos += 1
   UpperCAmelCase							=     pos - 1
   UpperCAmelCase							=     0
   for v in d.values():
      if len(lowerCAmelCase_   ) % 2 != 0:
         middle += 1
      else:
         UpperCAmelCase							=     0
         for i in range(0  ,						len(lowerCAmelCase_   )   ):
            if v[i] + v[len(lowerCAmelCase_   ) - 1 - step] != checksum:
               return False
            step += 1
      if middle > 1:
         return False
   return True







from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


__a     =			{"""configuration_ibert""": ["""IBERT_PRETRAINED_CONFIG_ARCHIVE_MAP""", """IBertConfig""", """IBertOnnxConfig"""]}

try:
 if not is_torch_available():
  raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
 pass
else:
 __a     =			[
     """IBERT_PRETRAINED_MODEL_ARCHIVE_LIST""",
     """IBertForMaskedLM""",
     """IBertForMultipleChoice""",
     """IBertForQuestionAnswering""",
     """IBertForSequenceClassification""",
     """IBertForTokenClassification""",
     """IBertModel""",
     """IBertPreTrainedModel""",
 ]

if TYPE_CHECKING:
 from .configuration_ibert import IBERT_PRETRAINED_CONFIG_ARCHIVE_MAP, IBertConfig, IBertOnnxConfig

 try:
  if not is_torch_available():
   raise OptionalDependencyNotAvailable()
 except OptionalDependencyNotAvailable:
  pass
 else:
  from .modeling_ibert import (
      IBERT_PRETRAINED_MODEL_ARCHIVE_LIST,
      IBertForMaskedLM,
      IBertForMultipleChoice,
      IBertForQuestionAnswering,
      IBertForSequenceClassification,
      IBertForTokenClassification,
      IBertModel,
      IBertPreTrainedModel,
  )

else:
 import sys

 __a     =			_LazyModule(__name__, globals()["""__file__"""], _import_structure, module_spec=__spec__)



