





from queue import PriorityQueue
from typing import Any

import numpy as np




def       __UpperCamelCase  (_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						)    ->       float | int:
  for nxt, d in graph[v]:
    if nxt in visited_forward:
      continue
    lowercase__           =  cst_fwd.get(_SCREAMING_SNAKE_CASE		,						np.inf		)
    lowercase__           =  cst_fwd[v] + d
    if new_cost_f < old_cost_f:
      queue.put((new_cost_f, nxt)		)
      lowercase__           =  new_cost_f
      lowercase__           =  v
    if nxt in visited_backward:
      if cst_fwd[v] + d + cst_bwd[nxt] < shortest_distance:
        lowercase__           =  cst_fwd[v] + d + cst_bwd[nxt]
  return shortest_distance




def       __UpperCamelCase  (_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		)    ->       int:
  lowercase__           =  -1

  lowercase__           =  set()
  lowercase__           =  set()
  lowercase__           =  {source: 0}
  lowercase__           =  {destination: 0}
  lowercase__           =  {source: None}
  lowercase__           =  {destination: None}
  lowercase__           =  PriorityQueue()
  lowercase__           =  PriorityQueue()

  lowercase__           =  np.inf

  queue_forward.put((0, source)		)
  queue_backward.put((0, destination)		)

  if source == destination:
    return 0

  while not queue_forward.empty() and not queue_backward.empty():
    lowercase__      ,   lowercase__           =  queue_forward.get()
    visited_forward.add(_SCREAMING_SNAKE_CASE		)

    lowercase__      ,   lowercase__           =  queue_backward.get()
    visited_backward.add(_SCREAMING_SNAKE_CASE		)

    lowercase__           =  pass_and_relaxation(
        _SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						)

    lowercase__           =  pass_and_relaxation(
        _SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						_SCREAMING_SNAKE_CASE		,						)

    if cst_fwd[v_fwd] + cst_bwd[v_bwd] >= shortest_distance:
      break

  if shortest_distance != np.inf:
    lowercase__           =  shortest_distance
  return shortest_path_distance


lowercase_          =		{
    """B""": [["""C""", 1]],
    """C""": [["""D""", 1]],
    """D""": [["""F""", 1]],
    """E""": [["""B""", 1], ["""G""", 2]],
    """F""": [],
    """G""": [["""F""", 1]],
}
lowercase_          =		{
    """B""": [["""E""", 1]],
    """C""": [["""B""", 1]],
    """D""": [["""C""", 1]],
    """F""": [["""D""", 1], ["""G""", 1]],
    """E""": [[None, np.inf]],
    """G""": [["""E""", 2]],
}

if __name__ == "__main__":
      import doctest

      doctest.testmod()









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


lowercase_          =		logging.get_logger(__name__)

lowercase_          =		{
    """transfo-xl-wt103""": """https://huggingface.co/transfo-xl-wt103/resolve/main/config.json""",
}
class     SCREAMING_SNAKE_CASE       (UpperCAmelCase				):
   _UpperCamelCase   :		Optional[Any]			 =	'transfo-xl'
   _UpperCamelCase   :		Any			 =	['mems']
   _UpperCamelCase   :		Any			 =	{
       'n_token': 'vocab_size',
       'hidden_size': 'd_model',
       'num_attention_heads': 'n_head',
       'num_hidden_layers': 'n_layer',
   }


   def __init__(   self      :    Optional[Any]      ,					a      :    Optional[int]=267_735      ,					a      :    str=[20_000, 40_000, 200_000]      ,					a      :    str=1_024      ,					a      :    str=1_024      ,					a      :    int=16      ,					a      :    Optional[int]=64      ,					a      :    Optional[int]=4_096      ,					a      :    int=4      ,					a      :    Tuple=False      ,					a      :    Any=18      ,					a      :    Tuple=1_600      ,					a      :    Union[str, Any]=1_000      ,					a      :    str=True      ,					a      :    Dict=True      ,					a      :    Any=0      ,					a      :    List[Any]=-1      ,					a      :    List[Any]=True      ,					a      :    Tuple=0.1      ,					a      :    List[Any]=0.0      ,					a      :    Optional[Any]=True      ,					a      :    int="normal"      ,					a      :    Optional[Any]=0.01      ,					a      :    str=0.01      ,					a      :    List[Any]=0.02      ,					a      :    List[Any]=1E-5      ,					a      :    Optional[Any]=0      ,					**a      :    Optional[int]      ,					)->       Optional[int]:





     """simple docstring"""







     lowercase__           =  vocab_size
     lowercase__           =  []
     self.cutoffs.extend(a	)
     if proj_share_all_but_first:
       lowercase__           =  [False] + [True] * len(self.cutoffs	)
     else:
       lowercase__           =  [False] + [False] * len(self.cutoffs	)
     lowercase__           =  d_model
     lowercase__           =  d_embed
     lowercase__           =  d_head
     lowercase__           =  d_inner
     lowercase__           =  div_val
     lowercase__           =  pre_lnorm
     lowercase__           =  n_layer
     lowercase__           =  n_head
     lowercase__           =  mem_len
     lowercase__           =  same_length
     lowercase__           =  attn_type
     lowercase__           =  clamp_len
     lowercase__           =  sample_softmax
     lowercase__           =  adaptive
     lowercase__           =  dropout
     lowercase__           =  dropatt
     lowercase__           =  untie_r
     lowercase__           =  init
     lowercase__           =  init_range
     lowercase__           =  proj_init_std
     lowercase__           =  init_std
     lowercase__           =  layer_norm_epsilon
     super().__init__(eos_token_id=a      ,					**a	)


   @property
   def 	SCREAMING_SNAKE_CASE_							(   self      :    Optional[Any]	)->       Union[str, Any]:





     """simple docstring"""







     logger.info(f"""The model {self.model_type} is one of the few models that has no sequence length limit."""	)
     return -1


   @max_position_embeddings.setter
   def 	SCREAMING_SNAKE_CASE_							(   self      :    Any      ,					a      :    Optional[int]	)->       Optional[int]:





     """simple docstring"""







     raise NotImplementedError(
         f"""The model {self.model_type} is one of the few models that has no sequence length limit."""	)


