




'''simple docstring'''





from abc import ABC, abstractmethod
from typing import List, Optional

class   _a							(		__lowerCAmelCase				):






     def __init__(					self       )				->     Optional[Any]:
          # test for the above condition
          self.test()






     def 							_lowercase      (					self       )				->     List[str]:
          _snake_case				= 0
          _snake_case				= False
          while not completed:
               if counter == 1:
                    self.reset()
               _snake_case				= self.advance()
               if not self.does_advance(_SCREAMING_SNAKE_CASE       ):
                    raise Exception(
                        "Custom Constraint is not defined correctly. self.does_advance(self.advance()) must be true."       )

               _snake_case				,   _snake_case				,   _snake_case				= self.update(_SCREAMING_SNAKE_CASE       )
               counter += 1

               if counter > 10_000:
                    raise Exception("update() does not fulfill the constraint."       )

          if self.remaining() != 0:
               raise Exception("Custom Constraint is not defined correctly."       )






     @abstractmethod
     def 							_lowercase      (					self       )				->     Union[str, Any]:
          raise NotImplementedError(
              f"""{self.__class__} is an abstract class. Only classes inheriting this class can be called."""       )






     @abstractmethod
     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     Union[str, Any]:
          raise NotImplementedError(
              f"""{self.__class__} is an abstract class. Only classes inheriting this class can be called."""       )






     @abstractmethod
     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     List[Any]:
          raise NotImplementedError(
              f"""{self.__class__} is an abstract class. Only classes inheriting this class can be called."""       )






     @abstractmethod
     def 							_lowercase      (					self       )				->     Tuple:
          raise NotImplementedError(
              f"""{self.__class__} is an abstract class. Only classes inheriting this class can be called."""       )






     @abstractmethod
     def 							_lowercase      (					self       )				->     Optional[Any]:
          raise NotImplementedError(
              f"""{self.__class__} is an abstract class. Only classes inheriting this class can be called."""       )






     @abstractmethod
     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE=False       )				->     Tuple:
          raise NotImplementedError(
              f"""{self.__class__} is an abstract class. Only classes inheriting this class can be called."""       )







class   _a							(		__lowerCAmelCase				):






     def __init__(					self   ,_SCREAMING_SNAKE_CASE       )				->     Optional[int]:
          super(_SCREAMING_SNAKE_CASE   ,self       ).__init__()

          if not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ) or len(_SCREAMING_SNAKE_CASE       ) == 0:
               raise ValueError(f"""`token_ids` has to be a non-empty list, but is {token_ids}."""       )
          if any((not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ) or token_id < 0) for token_id in token_ids       ):
               raise ValueError(f"""Each list in `token_ids` has to be a list of positive integers, but is {token_ids}."""       )

          _snake_case				= token_ids

          _snake_case				= len(self.token_ids       )
          _snake_case				= -1  # the index of the currently fulfilled step
          _snake_case				= False






     def 							_lowercase      (					self       )				->     Any:
          if self.completed:
               return None
          return self.token_ids[self.fulfilled_idx + 1]






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     Dict:
          if not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
               raise ValueError(f"""`token_id` has to be an `int`, but is {token_id} of type {type(_SCREAMING_SNAKE_CASE       )}"""       )

          if self.completed:
               return False

          return token_id == self.token_ids[self.fulfilled_idx + 1]






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     Optional[int]:
          if not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
               raise ValueError(f"""`token_id` has to be an `int`, but is {token_id} of type {type(_SCREAMING_SNAKE_CASE       )}"""       )

          _snake_case				= False
          _snake_case				= False
          _snake_case				= False

          if self.does_advance(_SCREAMING_SNAKE_CASE       ):
               self.fulfilled_idx += 1
               _snake_case				= True
               if self.fulfilled_idx == (self.seqlen - 1):
                    _snake_case				= True
               _snake_case				= completed
          else:
               # failed to make progress.
               _snake_case				= True
               self.reset()
          return stepped, completed, reset






     def 							_lowercase      (					self       )				->     Tuple:
          _snake_case				= False
          _snake_case				= 0






     def 							_lowercase      (					self       )				->     List[Any]:
          return self.seqlen - (self.fulfilled_idx + 1)






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE=False       )				->     Optional[Any]:
          _snake_case				= PhrasalConstraint(self.token_ids       )

          if stateful:
               _snake_case				= self.seqlen
               _snake_case				= self.fulfilled_idx
               _snake_case				= self.completed

          return new_constraint







class   _a							:






     def __init__(					self   ,_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE=True       )				->     Tuple:
          _snake_case				= max([len(_SCREAMING_SNAKE_CASE       ) for one in nested_token_ids]       )

          _snake_case				= {}
          for token_ids in nested_token_ids:
               _snake_case				= root
               for tidx, token_id in enumerate(_SCREAMING_SNAKE_CASE       ):
                    if token_id not in level:
                         _snake_case				= {}

                    _snake_case				= level[token_id]

          if no_subsets and self.has_subsets(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
               raise ValueError(
                   "Each list in `nested_token_ids` can't be a complete subset of another list, but is"
                   f""" {nested_token_ids}."""       )

          _snake_case				= root






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     List[Any]:
          _snake_case				= self.trie

          for current_token in current_seq:
               _snake_case				= start[current_token]

          _snake_case				= list(start.keys()       )

          return next_tokens






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     Dict:
          _snake_case				= self.next_tokens(_SCREAMING_SNAKE_CASE       )

          return len(_SCREAMING_SNAKE_CASE       ) == 0






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     int:
          _snake_case				= list(root.values()       )
          if len(_SCREAMING_SNAKE_CASE       ) == 0:
               return 1
          else:
               return sum([self.count_leaves(_SCREAMING_SNAKE_CASE       ) for nn in next_nodes]       )






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       )				->     Tuple:
          _snake_case				= self.count_leaves(_SCREAMING_SNAKE_CASE       )
          return len(_SCREAMING_SNAKE_CASE       ) != leaf_count







class   _a							(		__lowerCAmelCase				):






     def __init__(					self   ,_SCREAMING_SNAKE_CASE       )				->     str:
          super(_SCREAMING_SNAKE_CASE   ,self       ).__init__()

          if not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ) or len(_SCREAMING_SNAKE_CASE       ) == 0:
               raise ValueError(f"""`nested_token_ids` has to be a non-empty list, but is {nested_token_ids}."""       )
          if any(not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ) for token_ids in nested_token_ids       ):
               raise ValueError(f"""`nested_token_ids` has to be a list of lists, but is {nested_token_ids}."""       )
          if any(
              any((not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ) or token_id < 0) for token_id in token_ids       )
              for token_ids in nested_token_ids       ):
               raise ValueError(
                   f"""Each list in `nested_token_ids` has to be a list of positive integers, but is {nested_token_ids}."""       )

          _snake_case				= DisjunctiveTrie(_SCREAMING_SNAKE_CASE       )
          _snake_case				= nested_token_ids

          _snake_case				= self.trie.max_height
          _snake_case				= []
          _snake_case				= False






     def 							_lowercase      (					self       )				->     Dict:
          _snake_case				= self.trie.next_tokens(self.current_seq       )

          if len(_SCREAMING_SNAKE_CASE       ) == 0:
               return None
          else:
               return token_list






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     str:
          if not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
               raise ValueError(f"""`token_id` is supposed to be type `int`, but is {token_id} of type {type(_SCREAMING_SNAKE_CASE       )}"""       )

          _snake_case				= self.trie.next_tokens(self.current_seq       )

          return token_id in next_tokens






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     int:
          if not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
               raise ValueError(f"""`token_id` is supposed to be type `int`, but is {token_id} of type {type(_SCREAMING_SNAKE_CASE       )}"""       )

          _snake_case				= False
          _snake_case				= False
          _snake_case				= False

          if self.does_advance(_SCREAMING_SNAKE_CASE       ):
               self.current_seq.append(_SCREAMING_SNAKE_CASE       )
               _snake_case				= True
          else:
               _snake_case				= True
               self.reset()

          _snake_case				= self.trie.reached_leaf(self.current_seq       )
          _snake_case				= completed

          return stepped, completed, reset






     def 							_lowercase      (					self       )				->     Union[str, Any]:
          _snake_case				= False
          _snake_case				= []






     def 							_lowercase      (					self       )				->     Optional[Any]:
          if self.completed:
               # since this can be completed without reaching max height
               return 0
          else:
               return self.seqlen - len(self.current_seq       )






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE=False       )				->     List[Any]:
          _snake_case				= DisjunctiveConstraint(self.token_ids       )

          if stateful:
               _snake_case				= self.seqlen
               _snake_case				= self.current_seq
               _snake_case				= self.completed

          return new_constraint







class   _a							:






     def __init__(					self   ,_SCREAMING_SNAKE_CASE       )				->     int:
          _snake_case				= constraints

          # max # of steps required to fulfill a given constraint
          _snake_case				= max([c.seqlen for c in constraints]       )
          _snake_case				= len(_SCREAMING_SNAKE_CASE       )
          _snake_case				= False

          self.init_state()






     def 							_lowercase      (					self       )				->     Any:
          _snake_case				= []
          _snake_case				= None
          _snake_case				= [constraint.copy(stateful=_SCREAMING_SNAKE_CASE       ) for constraint in self.constraints]






     def 							_lowercase      (					self       )				->     int:
          _snake_case				= 0
          if self.inprogress_constraint:
               # extra points for having a constraint mid-fulfilled
               add += self.max_seqlen - self.inprogress_constraint.remaining()

          return (len(self.complete_constraints       ) * self.max_seqlen) + add






     def 							_lowercase      (					self       )				->     Optional[int]:
          _snake_case				= []
          if self.inprogress_constraint is None:
               for constraint in self.pending_constraints:  # "pending" == "unfulfilled yet"
                    _snake_case				= constraint.advance()
                    if isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
                         token_list.append(_SCREAMING_SNAKE_CASE       )
                    elif isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
                         token_list.extend(_SCREAMING_SNAKE_CASE       )
          else:
               _snake_case				= self.inprogress_constraint.advance()
               if isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
                    token_list.append(_SCREAMING_SNAKE_CASE       )
               elif isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
                    token_list.extend(_SCREAMING_SNAKE_CASE       )

          if len(_SCREAMING_SNAKE_CASE       ) == 0:
               return None
          else:
               return token_list






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     Any:
          self.init_state()

          if token_ids is not None:
               for token in token_ids:
                    # completes or steps **one** constraint
                    _snake_case				,   _snake_case				= self.add(_SCREAMING_SNAKE_CASE       )

                    # the entire list of constraints are fulfilled
                    if self.completed:
                         break






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     Tuple:
          if not isinstance(_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       ):
               raise ValueError(f"""`token_id` should be an `int`, but is `{token_id}`."""       )

          _snake_case				,   _snake_case				= False, False

          if self.completed:
               _snake_case				= True
               _snake_case				= False
               return complete, stepped

          if self.inprogress_constraint is not None:
               # In the middle of fulfilling a constraint. If the `token_id` *does* makes an incremental progress to current
               # job, simply update the state

               _snake_case				,   _snake_case				,   _snake_case				= self.inprogress_constraint.update(_SCREAMING_SNAKE_CASE       )
               if reset:
                    # 1. If the next token breaks the progress, then we must restart.
                    #     e.g. constraint = "I love pies" and sequence so far is "I love" but `token_id` == "books".

                    #     But that doesn't mean we self.init_state(), since we only reset the state for this particular
                    #     constraint, not the full list of constraints.

                    self.pending_constraints.append(self.inprogress_constraint.copy(stateful=_SCREAMING_SNAKE_CASE       )       )
                    _snake_case				= None

               if complete:
                    # 2. If the next token completes the constraint, move it to completed list, set
                    #     inprogress to None. If there are no pending constraints either, then this full list of constraints
                    #     is complete.

                    self.complete_constraints.append(self.inprogress_constraint       )
                    _snake_case				= None

                    if len(self.pending_constraints       ) == 0:
                         # we're done!
                         _snake_case				= True

          else:
               # Not in the middle of fulfilling a constraint. So does this `token_id` helps us step towards any of our list
               # of constraints?

               for cidx, pending_constraint in enumerate(self.pending_constraints       ):
                    if pending_constraint.does_advance(_SCREAMING_SNAKE_CASE       ):
                         _snake_case				,   _snake_case				,   _snake_case				= pending_constraint.update(_SCREAMING_SNAKE_CASE       )

                         if not stepped:
                              raise Exception(
                                  "`constraint.update(token_id)` is not yielding incremental progress, "
                                  "even though `constraint.does_advance(token_id)` is true."       )

                         if complete:
                              self.complete_constraints.append(_SCREAMING_SNAKE_CASE       )
                              _snake_case				= None

                         if not complete and stepped:
                              _snake_case				= pending_constraint

                         if complete or stepped:
                              # If we made any progress at all, then it's at least not a "pending constraint".

                              _snake_case				= (
                                  self.pending_constraints[:cidx] + self.pending_constraints[cidx + 1 :]
                              )

                              if len(self.pending_constraints       ) == 0 and self.inprogress_constraint is None:
                                   # If there's no longer any pending after this and no inprogress either, then we must be
                                   # complete.

                                   _snake_case				= True

                              break  # prevent accidentally stepping through multiple constraints with just one token.

          return complete, stepped






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE=True       )				->     str:
          _snake_case				= ConstraintListState(self.constraints       )  # we actually never though self.constraints objects
          # throughout this process. So it's at initialization state.

          if stateful:
               _snake_case				= [
                   constraint.copy(stateful=_SCREAMING_SNAKE_CASE       ) for constraint in self.complete_constraints
               ]
               if self.inprogress_constraint is not None:
                    _snake_case				= self.inprogress_constraint.copy(stateful=_SCREAMING_SNAKE_CASE       )
               _snake_case				= [constraint.copy() for constraint in self.pending_constraints]

          return new_state








'''simple docstring'''





from typing import Any

class   _a							:






     def __init__(					self   ,_SCREAMING_SNAKE_CASE       )				->     List[str]:
          _snake_case				= data
          _snake_case				= None







class   _a							:






     def __init__(					self       )				->     List[Any]:
          _snake_case				= None






     def 							_lowercase      (					self       )				->     str:
          _snake_case				= self.head
          while temp is not None:
               print(temp.data   ,end=" "       )
               _snake_case				= temp.next
          print()






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE       )				->     Dict:
          _snake_case				= Node(_SCREAMING_SNAKE_CASE       )
          _snake_case				= self.head
          _snake_case				= new_node






     def 							_lowercase      (					self   ,_SCREAMING_SNAKE_CASE   ,_SCREAMING_SNAKE_CASE       )				->     Tuple:
          if node_data_a == node_data_a:
               return
          else:
               _snake_case				= self.head
               while node_a is not None and node_a.data != node_data_a:
                    _snake_case				= node_a.next

               _snake_case				= self.head
               while node_a is not None and node_a.data != node_data_a:
                    _snake_case				= node_a.next

               if node_a is None or node_a is None:
                    return

               _snake_case				,   _snake_case				= node_a.data, node_a.data


if __name__ == "__main__":
   UpperCamelCase_		:     str          =		LinkedList()
   for i in range(5, 0, -1):
      ll.push(i)

   ll.print_list()

   ll.swap_nodes(1, 4)
   print('''After swapping''')
   ll.print_list()


