





from __future__ import annotations

import time

A__:    str  	=	list[tuple[int, int]]

A__:    List[str]  	=	[
    [0, 0, 0, 0, 0, 0, 0],
    [0, 1, 0, 0, 0, 0, 0],  # 0 are free path whereas 1's are obstacles
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 1, 0, 0, 0, 0],
    [1, 0, 1, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 1, 0, 0],
]

A__:    int  	=	[[-1, 0], [0, -1], [1, 0], [0, 1]]  # up, left, down, right




class        _a    :

      """simple docstring"""


      def __init__(		self:			Optional[Any]	,    __lowerCamelCase:			int	,    __lowerCamelCase:			int	,    __lowerCamelCase:			int	,    __lowerCamelCase:			int	,    __lowerCamelCase:			Node | None					):
          '''simple docstring'''


          UpperCamelCase__:	List[str]					=     pos_x
          UpperCamelCase__:	Optional[int]					=     pos_y
          UpperCamelCase__:	int					=     (pos_y, pos_x)
          UpperCamelCase__:	Tuple					=     goal_x
          UpperCamelCase__:	int					=     goal_y
          UpperCamelCase__:	Optional[Any]					=     parent




class        _a    :

      """simple docstring"""


      def __init__(		self:			Any	,    __lowerCamelCase:			tuple[int, int]	,    __lowerCamelCase:			tuple[int, int]					):
          '''simple docstring'''


          UpperCamelCase__:	Optional[Any]					=     Node(start[1]	,    start[0]	,    goal[1]	,    goal[0]	,    __lowerCamelCase					)
          UpperCamelCase__:	Dict					=     Node(goal[1]	,    goal[0]	,    goal[1]	,    goal[0]	,    __lowerCamelCase					)

          UpperCamelCase__:	Any					=     [self.start]
          UpperCamelCase__:	Union[str, Any]					=     False






      def 			UpperCAmelCase_       (		self:			Any					):
          '''simple docstring'''


          while self.node_queue:
              UpperCamelCase__:	int					=     self.node_queue.pop(0					)

              if current_node.pos == self.target.pos:
                  UpperCamelCase__:	Dict					=     True
                  return self.retrace_path(__lowerCamelCase					)

              UpperCamelCase__:	List[Any]					=     self.get_successors(__lowerCamelCase					)

              for node in successors:
                  self.node_queue.append(__lowerCamelCase					)

          if not self.reached:
              return [self.start.pos]
          return None






      def 			UpperCAmelCase_       (		self:			Optional[Any]	,    __lowerCamelCase:			Node					):
          '''simple docstring'''


          UpperCamelCase__:	Optional[int]					=     []
          for action in delta:
              UpperCamelCase__:	Union[str, Any]					=     parent.pos_x + action[1]
              UpperCamelCase__:	Dict					=     parent.pos_y + action[0]
              if not (0 <= pos_x <= len(grid[0]					) - 1 and 0 <= pos_y <= len(__lowerCamelCase					) - 1):
                  continue

              if grid[pos_y][pos_x] != 0:
                  continue

              successors.append(
                  Node(__lowerCamelCase	,    __lowerCamelCase	,    self.target.pos_y	,    self.target.pos_x	,    __lowerCamelCase					)					)
          return successors






      def 			UpperCAmelCase_       (		self:			Tuple	,    __lowerCamelCase:			Node | None					):
          '''simple docstring'''


          UpperCamelCase__:	int					=     node
          UpperCamelCase__:	Optional[Any]					=     []
          while current_node is not None:
              path.append((current_node.pos_y, current_node.pos_x)					)
              UpperCamelCase__:	List[str]					=     current_node.parent
          path.reverse()
          return path




class        _a    :

      """simple docstring"""


      def __init__(		self:			Union[str, Any]	,    __lowerCamelCase:			Any	,    __lowerCamelCase:			str					):
          '''simple docstring'''


          UpperCamelCase__:	Any					=     BreadthFirstSearch(__lowerCamelCase	,    __lowerCamelCase					)
          UpperCamelCase__:	Optional[Any]					=     BreadthFirstSearch(__lowerCamelCase	,    __lowerCamelCase					)
          UpperCamelCase__:	List[Any]					=     False






      def 			UpperCAmelCase_       (		self:			Optional[int]					):
          '''simple docstring'''


          while self.fwd_bfs.node_queue or self.bwd_bfs.node_queue:
              UpperCamelCase__:	str					=     self.fwd_bfs.node_queue.pop(0					)
              UpperCamelCase__:	List[str]					=     self.bwd_bfs.node_queue.pop(0					)

              if current_bwd_node.pos == current_fwd_node.pos:
                  UpperCamelCase__:	Dict					=     True
                  return self.retrace_bidirectional_path(
                      __lowerCamelCase	,    __lowerCamelCase					)

              UpperCamelCase__:	Optional[int]					=     current_bwd_node
              UpperCamelCase__:	Any					=     current_fwd_node

              UpperCamelCase__:	List[str]					=     {
                  self.fwd_bfs: self.fwd_bfs.get_successors(__lowerCamelCase					),
                  self.bwd_bfs: self.bwd_bfs.get_successors(__lowerCamelCase					),
              }

              for bfs in [self.fwd_bfs, self.bwd_bfs]:
                  for node in successors[bfs]:
                      bfs.node_queue.append(__lowerCamelCase					)

          if not self.reached:
              return [self.fwd_bfs.start.pos]
          return None






      def 			UpperCAmelCase_       (		self:			Any	,    __lowerCamelCase:			Node	,    __lowerCamelCase:			Node					):
          '''simple docstring'''


          UpperCamelCase__:	Any					=     self.fwd_bfs.retrace_path(__lowerCamelCase					)
          UpperCamelCase__:	Union[str, Any]					=     self.bwd_bfs.retrace_path(__lowerCamelCase					)
          bwd_path.pop()
          bwd_path.reverse()
          UpperCamelCase__:	Any					=     fwd_path + bwd_path
          return path


if __name__ == "__main__":
   # all coordinates are given in format [y,x]
   import doctest

   doctest.testmod()
   A__:    Optional[Any]  	=	(0, 0)
   A__:    List[Any]  	=	(len(grid) - 1, len(grid[0]) - 1)
   for elem in grid:
      print(elem)

   A__:    List[Any]  	=	time.time()
   A__:    List[str]  	=	BreadthFirstSearch(init, goal)
   A__:    Union[str, Any]  	=	bfs.search()
   A__:    List[Any]  	=	time.time() - start_bfs_time

   print('''Unidirectional BFS computation time : ''', bfs_time)

   A__:    Dict  	=	time.time()
   A__:    Optional[Any]  	=	BidirectionalBreadthFirstSearch(init, goal)
   A__:    List[Any]  	=	bd_bfs.search()
   A__:    Union[str, Any]  	=	time.time() - start_bd_bfs_time

   print('''Bidirectional BFS computation time : ''', bd_bfs_time)








import logging

from transformers import PretrainedConfig


A__:    Dict  	=	logging.getLogger(__name__)


A__:    List[Any]  	=	{
    '''bertabs-finetuned-cnndm''': '''https://huggingface.co/remi/bertabs-finetuned-cnndm-extractive-abstractive-summarization/resolve/main/config.json''',
}




class        _a    (    UpperCamelCase__):

      """simple docstring"""


      UpperCamelCase__  		=       """bertabs"""






      def __init__(		self:			Any	,    __lowerCamelCase:			Optional[int]=3_0522	,    __lowerCamelCase:			List[Any]=512	,    __lowerCamelCase:			Optional[Any]=6	,    __lowerCamelCase:			Optional[Any]=512	,    __lowerCamelCase:			List[str]=8	,    __lowerCamelCase:			List[Any]=512	,    __lowerCamelCase:			Optional[int]=0.2	,    __lowerCamelCase:			Optional[int]=6	,    __lowerCamelCase:			Optional[Any]=768	,    __lowerCamelCase:			int=8	,    __lowerCamelCase:			Union[str, Any]=2048	,    __lowerCamelCase:			Dict=0.2	,    **__lowerCamelCase:			Dict	,    ):
          '''simple docstring'''


          super().__init__(**__lowerCamelCase					)

          UpperCamelCase__:	str					=     vocab_size
          UpperCamelCase__:	Tuple					=     max_pos

          UpperCamelCase__:	Union[str, Any]					=     enc_layers
          UpperCamelCase__:	Optional[Any]					=     enc_hidden_size
          UpperCamelCase__:	Optional[Any]					=     enc_heads
          UpperCamelCase__:	Dict					=     enc_ff_size
          UpperCamelCase__:	Tuple					=     enc_dropout

          UpperCamelCase__:	Tuple					=     dec_layers
          UpperCamelCase__:	int					=     dec_hidden_size
          UpperCamelCase__:	int					=     dec_heads
          UpperCamelCase__:	str					=     dec_ff_size
          UpperCamelCase__:	Union[str, Any]					=     dec_dropout

