

from __future__ import annotations

import time

UpperCamelCase__  :      Optional[int]			=    list[tuple[int, int]]

UpperCamelCase__  :      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],
]

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



class       __snake_case  :

  def __init__(					self						,		_A						,		_A						,		_A						,		_A						,		_A):
      SCREAMING_SNAKE_CASE_									=						pos_x
      SCREAMING_SNAKE_CASE_									=						pos_y
      SCREAMING_SNAKE_CASE_									=						(pos_y, pos_x)
      SCREAMING_SNAKE_CASE_									=						goal_x
      SCREAMING_SNAKE_CASE_									=						goal_y
      SCREAMING_SNAKE_CASE_									=						parent






class       __snake_case  :

  def __init__(					self						,		_A						,		_A):
      SCREAMING_SNAKE_CASE_									=						Node(start[1]						,		start[0]						,		goal[1]						,		goal[0]						,		_A)
      SCREAMING_SNAKE_CASE_									=						Node(goal[1]						,		goal[0]						,		goal[1]						,		goal[0]						,		_A)

      SCREAMING_SNAKE_CASE_									=						[self.start]
      SCREAMING_SNAKE_CASE_									=						False

  def 						lowerCAmelCase__     (					self):
      while self.node_queue:
          SCREAMING_SNAKE_CASE_									=						self.node_queue.pop(0)

          if current_node.pos == self.target.pos:
              SCREAMING_SNAKE_CASE_									=						True
              return self.retrace_path(_A)

          SCREAMING_SNAKE_CASE_									=						self.get_successors(_A)

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

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

  def 						lowerCAmelCase__     (					self						,		_A):
      SCREAMING_SNAKE_CASE_									=						[]
      for action in delta:
          SCREAMING_SNAKE_CASE_									=						parent.pos_x + action[1]
          SCREAMING_SNAKE_CASE_									=						parent.pos_y + action[0]
          if not (0 <= pos_x <= len(grid[0]) - 1 and 0 <= pos_y <= len(_A) - 1):
              continue

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

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


  def 						lowerCAmelCase__     (					self						,		_A):
      SCREAMING_SNAKE_CASE_									=						node
      SCREAMING_SNAKE_CASE_									=						[]
      while current_node is not None:
          path.append((current_node.pos_y, current_node.pos_x))
          SCREAMING_SNAKE_CASE_									=						current_node.parent
      path.reverse()
      return path






class       __snake_case  :

  def __init__(					self						,		_A						,		_A):
      SCREAMING_SNAKE_CASE_									=						BreadthFirstSearch(_A						,		_A)
      SCREAMING_SNAKE_CASE_									=						BreadthFirstSearch(_A						,		_A)
      SCREAMING_SNAKE_CASE_									=						False

  def 						lowerCAmelCase__     (					self):
      while self.fwd_bfs.node_queue or self.bwd_bfs.node_queue:
          SCREAMING_SNAKE_CASE_									=						self.fwd_bfs.node_queue.pop(0)
          SCREAMING_SNAKE_CASE_									=						self.bwd_bfs.node_queue.pop(0)

          if current_bwd_node.pos == current_fwd_node.pos:
              SCREAMING_SNAKE_CASE_									=						True
              return self.retrace_bidirectional_path(
                  _A						,		_A)

          SCREAMING_SNAKE_CASE_									=						current_bwd_node
          SCREAMING_SNAKE_CASE_									=						current_fwd_node

          SCREAMING_SNAKE_CASE_									=						{
              self.fwd_bfs: self.fwd_bfs.get_successors(_A),
              self.bwd_bfs: self.bwd_bfs.get_successors(_A),
          }

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

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


  def 						lowerCAmelCase__     (					self						,		_A						,		_A):
      SCREAMING_SNAKE_CASE_									=						self.fwd_bfs.retrace_path(_A)
      SCREAMING_SNAKE_CASE_									=						self.bwd_bfs.retrace_path(_A)
      bwd_path.pop()
      bwd_path.reverse()
      SCREAMING_SNAKE_CASE_									=						fwd_path + bwd_path
      return path


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

       doctest.testmod()
       UpperCamelCase__  :      Tuple			=    (0, 0)
       UpperCamelCase__  :      Tuple			=    (len(grid) - 1, len(grid[0]) - 1)
       for elem in grid:
              print(elem)

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

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

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

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





from ...configuration_utils import PretrainedConfig
from ...utils import logging


UpperCamelCase__  :      str			=    logging.get_logger(__name__)

UpperCamelCase__  :      Optional[int]			=    {
    "facebook/dpr-ctx_encoder-single-nq-base": (
        "https://huggingface.co/facebook/dpr-ctx_encoder-single-nq-base/resolve/main/config.json"
    ),
    "facebook/dpr-question_encoder-single-nq-base": (
        "https://huggingface.co/facebook/dpr-question_encoder-single-nq-base/resolve/main/config.json"
    ),
    "facebook/dpr-reader-single-nq-base": (
        "https://huggingface.co/facebook/dpr-reader-single-nq-base/resolve/main/config.json"
    ),
    "facebook/dpr-ctx_encoder-multiset-base": (
        "https://huggingface.co/facebook/dpr-ctx_encoder-multiset-base/resolve/main/config.json"
    ),
    "facebook/dpr-question_encoder-multiset-base": (
        "https://huggingface.co/facebook/dpr-question_encoder-multiset-base/resolve/main/config.json"
    ),
    "facebook/dpr-reader-multiset-base": (
        "https://huggingface.co/facebook/dpr-reader-multiset-base/resolve/main/config.json"
    ),
}



class       __snake_case  (    lowerCAmelCase__       ):
  __lowerCAmelCase     :	Optional[int]						 =  'dpr'

  def __init__(					self						,		_A=30522						,		_A=768						,		_A=12						,		_A=12						,		_A=3072						,		_A="gelu"						,		_A=0.1						,		_A=0.1						,		_A=512						,		_A=2						,		_A=0.0_2						,		_A=1E-12						,		_A=0						,		_A="absolute"						,		_A = 0						,		**_A						,		):
      super().__init__(pad_token_id=_A						,		**_A)

      SCREAMING_SNAKE_CASE_									=						vocab_size
      SCREAMING_SNAKE_CASE_									=						hidden_size
      SCREAMING_SNAKE_CASE_									=						num_hidden_layers
      SCREAMING_SNAKE_CASE_									=						num_attention_heads
      SCREAMING_SNAKE_CASE_									=						hidden_act
      SCREAMING_SNAKE_CASE_									=						intermediate_size
      SCREAMING_SNAKE_CASE_									=						hidden_dropout_prob
      SCREAMING_SNAKE_CASE_									=						attention_probs_dropout_prob
      SCREAMING_SNAKE_CASE_									=						max_position_embeddings
      SCREAMING_SNAKE_CASE_									=						type_vocab_size
      SCREAMING_SNAKE_CASE_									=						initializer_range
      SCREAMING_SNAKE_CASE_									=						layer_norm_eps
      SCREAMING_SNAKE_CASE_									=						projection_dim
      SCREAMING_SNAKE_CASE_									=						position_embedding_type


