




import json
import os
from functools import lru_cache
from typing import List, Optional, Tuple

import regex as re

from ...tokenization_utils import AddedToken, PreTrainedTokenizer
from ...utils import logging


_lowerCamelCase      :						Optional[int]							=  logging.get_logger(__name__)


_lowerCamelCase      :						Optional[int]							=  {"""vocab_file""": """vocab.json""", """merges_file""": """merges.txt"""}

_lowerCamelCase      :						Dict							=  {
    """vocab_file""": {
        """allenai/longformer-base-4096""": """https://huggingface.co/allenai/longformer-base-4096/resolve/main/vocab.json""",
        """allenai/longformer-large-4096""": (
            """https://huggingface.co/allenai/longformer-large-4096/resolve/main/vocab.json"""
        ),
        """allenai/longformer-large-4096-finetuned-triviaqa""": (
            """https://huggingface.co/allenai/longformer-large-4096-finetuned-triviaqa/resolve/main/vocab.json"""
        ),
        """allenai/longformer-base-4096-extra.pos.embd.only""": (
            """https://huggingface.co/allenai/longformer-base-4096-extra.pos.embd.only/resolve/main/vocab.json"""
        ),
        """allenai/longformer-large-4096-extra.pos.embd.only""": (
            """https://huggingface.co/allenai/longformer-large-4096-extra.pos.embd.only/resolve/main/vocab.json"""
        ),
    },
    """merges_file""": {
        """allenai/longformer-base-4096""": """https://huggingface.co/allenai/longformer-base-4096/resolve/main/merges.txt""",
        """allenai/longformer-large-4096""": (
            """https://huggingface.co/allenai/longformer-large-4096/resolve/main/merges.txt"""
        ),
        """allenai/longformer-large-4096-finetuned-triviaqa""": (
            """https://huggingface.co/allenai/longformer-large-4096-finetuned-triviaqa/resolve/main/merges.txt"""
        ),
        """allenai/longformer-base-4096-extra.pos.embd.only""": (
            """https://huggingface.co/allenai/longformer-base-4096-extra.pos.embd.only/resolve/main/merges.txt"""
        ),
        """allenai/longformer-large-4096-extra.pos.embd.only""": (
            """https://huggingface.co/allenai/longformer-large-4096-extra.pos.embd.only/resolve/main/merges.txt"""
        ),
    },
}

_lowerCamelCase      :						Dict							=  {
    """allenai/longformer-base-4096""": 4096,
    """allenai/longformer-large-4096""": 4096,
    """allenai/longformer-large-4096-finetuned-triviaqa""": 4096,
    """allenai/longformer-base-4096-extra.pos.embd.only""": 4096,
    """allenai/longformer-large-4096-extra.pos.embd.only""": 4096,
}







@lru_cache()
# Copied from transformers.models.roberta.tokenization_roberta.bytes_to_unicode
def SCREAMING_SNAKE_CASE							(			)  ->			str:



       """simple docstring"""

       A__ 					=       (
           list(range(ord('''!'''		)					,							ord('''~'''		) + 1		)		) + list(range(ord('''¡'''		)					,							ord('''¬'''		) + 1		)		) + list(range(ord('''®'''		)					,							ord('''ÿ'''		) + 1		)		)
       )
       A__ 					=       bs[:]
       A__ 					=       0
       for b in range(2**8		):
              if b not in bs:
                     bs.append(lowercase_		)
                     cs.append(2**8 + n		)
                     n += 1
       A__ 					=       [chr(lowercase_		) for n in cs]
       return dict(zip(lowercase_					,							lowercase_		)		)







def SCREAMING_SNAKE_CASE							(			lowercase_		)  ->			str:



       """simple docstring"""

       A__ 					=       set()
       A__ 					=       word[0]
       for char in word[1:]:
              pairs.add((prev_char, char)		)
              A__ 					=       char
       return pairs


class 							UpperCamelCase_       (					UpperCAmelCase__	):

    '''simple docstring'''






    UpperCAmelCase__				    = VOCAB_FILES_NAMES
    UpperCAmelCase__				    = PRETRAINED_VOCAB_FILES_MAP
    UpperCAmelCase__				    = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
    UpperCAmelCase__				    = ['''input_ids''', '''attention_mask''']


    def __init__(     self :      int   ,					UpperCAmelCase__ :      int   ,					UpperCAmelCase__ :      Optional[int]   ,					UpperCAmelCase__ :      List[Any]="replace"   ,					UpperCAmelCase__ :      List[Any]="<s>"   ,					UpperCAmelCase__ :      Tuple="</s>"   ,					UpperCAmelCase__ :      str="</s>"   ,					UpperCAmelCase__ :      Union[str, Any]="<s>"   ,					UpperCAmelCase__ :      Dict="<unk>"   ,					UpperCAmelCase__ :      str="<pad>"   ,					UpperCAmelCase__ :      List[str]="<mask>"   ,					UpperCAmelCase__ :      Optional[int]=False   ,					**UpperCAmelCase__ :      Tuple   ,					)		->Optional[Any]:





           '''simple docstring'''

           A__ 					=       AddedToken(UpperCAmelCase__   ,					lstrip=UpperCAmelCase__   ,					rstrip=UpperCAmelCase__) if isinstance(UpperCAmelCase__   ,					UpperCAmelCase__) else bos_token
           A__ 					=       AddedToken(UpperCAmelCase__   ,					lstrip=UpperCAmelCase__   ,					rstrip=UpperCAmelCase__) if isinstance(UpperCAmelCase__   ,					UpperCAmelCase__) else eos_token
           A__ 					=       AddedToken(UpperCAmelCase__   ,					lstrip=UpperCAmelCase__   ,					rstrip=UpperCAmelCase__) if isinstance(UpperCAmelCase__   ,					UpperCAmelCase__) else sep_token
           A__ 					=       AddedToken(UpperCAmelCase__   ,					lstrip=UpperCAmelCase__   ,					rstrip=UpperCAmelCase__) if isinstance(UpperCAmelCase__   ,					UpperCAmelCase__) else cls_token
           A__ 					=       AddedToken(UpperCAmelCase__   ,					lstrip=UpperCAmelCase__   ,					rstrip=UpperCAmelCase__) if isinstance(UpperCAmelCase__   ,					UpperCAmelCase__) else unk_token
           A__ 					=       AddedToken(UpperCAmelCase__   ,					lstrip=UpperCAmelCase__   ,					rstrip=UpperCAmelCase__) if isinstance(UpperCAmelCase__   ,					UpperCAmelCase__) else pad_token

           # Mask token behave like a normal word, i.e. include the space before it
           A__ 					=       AddedToken(UpperCAmelCase__   ,					lstrip=UpperCAmelCase__   ,					rstrip=UpperCAmelCase__) if isinstance(UpperCAmelCase__   ,					UpperCAmelCase__) else mask_token

           super().__init__(
               errors=UpperCAmelCase__   ,					bos_token=UpperCAmelCase__   ,					eos_token=UpperCAmelCase__   ,					unk_token=UpperCAmelCase__   ,					sep_token=UpperCAmelCase__   ,					cls_token=UpperCAmelCase__   ,					pad_token=UpperCAmelCase__   ,					mask_token=UpperCAmelCase__   ,					add_prefix_space=UpperCAmelCase__   ,					**UpperCAmelCase__   ,					)

           with open(UpperCAmelCase__   ,					encoding='''utf-8''') as vocab_handle:
                  A__ 					=       json.load(UpperCAmelCase__)
           A__ 					=       {v: k for k, v in self.encoder.items()}
           A__ 					=       errors  # how to handle errors in decoding
           A__ 					=       bytes_to_unicode()
           A__ 					=       {v: k for k, v in self.byte_encoder.items()}
           with open(UpperCAmelCase__   ,					encoding='''utf-8''') as merges_handle:
                  A__ 					=       merges_handle.read().split('''\n''')[1:-1]
           A__ 					=       [tuple(merge.split()) for merge in bpe_merges]
           A__ 					=       dict(zip(UpperCAmelCase__   ,					range(len(UpperCAmelCase__))))
           A__ 					=       {}
           A__ 					=       add_prefix_space

           # Should have added re.IGNORECASE so BPE merges can happen for capitalized versions of contractions
           A__ 					=       re.compile(R'''\'s|\'t|\'re|\'ve|\'m|\'ll|\'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+''')


    @property
    def 			SCREAMING_SNAKE_CASE				(     self :      List[Any])		->int:





           '''simple docstring'''

           return len(self.encoder)


    def 			SCREAMING_SNAKE_CASE				(     self :      List[Any])		->Optional[Any]:





           '''simple docstring'''

           return dict(self.encoder   ,					**self.added_tokens_encoder)


    def 			SCREAMING_SNAKE_CASE				(     self :      List[Any]   ,					UpperCAmelCase__ :      Optional[Any])		->List[Any]:





           '''simple docstring'''

           if token in self.cache:
                  return self.cache[token]
           A__ 					=       tuple(UpperCAmelCase__)
           A__ 					=       get_pairs(UpperCAmelCase__)

           if not pairs:
                  return token

           while True:
                  A__ 					=       min(UpperCAmelCase__   ,					key=lambda UpperCAmelCase__: self.bpe_ranks.get(UpperCAmelCase__   ,					float('''inf''')))
                  if bigram not in self.bpe_ranks:
                         break
                  A__					,				A__ 					=       bigram
                  A__ 					=       []
                  A__ 					=       0
                  while i < len(UpperCAmelCase__):
                         try:
                                A__ 					=       word.index(UpperCAmelCase__   ,					UpperCAmelCase__)
                         except ValueError:
                                new_word.extend(word[i:])
                                break
                         else:
                                new_word.extend(word[i:j])
                                A__ 					=       j

                         if word[i] == first and i < len(UpperCAmelCase__) - 1 and word[i + 1] == second:
                                new_word.append(first + second)
                                i += 2
                         else:
                                new_word.append(word[i])
                                i += 1
                  A__ 					=       tuple(UpperCAmelCase__)
                  A__ 					=       new_word
                  if len(UpperCAmelCase__) == 1:
                         break
                  else:
                         A__ 					=       get_pairs(UpperCAmelCase__)
           A__ 					=       ''' '''.join(UpperCAmelCase__)
           A__ 					=       word
           return word


    def 			SCREAMING_SNAKE_CASE				(     self :      Tuple   ,					UpperCAmelCase__ :      int)		->str:





           '''simple docstring'''

           A__ 					=       []
           for token in re.findall(self.pat   ,					UpperCAmelCase__):
                  A__ 					=       ''''''.join(
                      self.byte_encoder[b] for b in token.encode('''utf-8'''))  # Maps all our bytes to unicode strings, avoiding control tokens of the BPE (spaces in our case)
                  bpe_tokens.extend(bpe_token for bpe_token in self.bpe(UpperCAmelCase__).split(''' '''))
           return bpe_tokens


    def 			SCREAMING_SNAKE_CASE				(     self :      List[str]   ,					UpperCAmelCase__ :      Any)		->Optional[Any]:





           '''simple docstring'''

           return self.encoder.get(UpperCAmelCase__   ,					self.encoder.get(self.unk_token))


    def 			SCREAMING_SNAKE_CASE				(     self :      Optional[int]   ,					UpperCAmelCase__ :      List[Any])		->int:





           '''simple docstring'''

           return self.decoder.get(UpperCAmelCase__)


    def 			SCREAMING_SNAKE_CASE				(     self :      Optional[Any]   ,					UpperCAmelCase__ :      List[str])		->Any:





           '''simple docstring'''

           A__ 					=       ''''''.join(UpperCAmelCase__)
           A__ 					=       bytearray([self.byte_decoder[c] for c in text]).decode('''utf-8'''   ,					errors=self.errors)
           return text


    def 			SCREAMING_SNAKE_CASE				(     self :      List[str]   ,					UpperCAmelCase__ :      str   ,					UpperCAmelCase__ :      Optional[str] = None)		->Tuple[str]:





           '''simple docstring'''

           if not os.path.isdir(UpperCAmelCase__):
                  logger.error(f"""Vocabulary path ({save_directory}) should be a directory""")
                  return
           A__ 					=       os.path.join(
               UpperCAmelCase__   ,					(filename_prefix + '''-''' if filename_prefix else '''''') + VOCAB_FILES_NAMES['''vocab_file'''])
           A__ 					=       os.path.join(
               UpperCAmelCase__   ,					(filename_prefix + '''-''' if filename_prefix else '''''') + VOCAB_FILES_NAMES['''merges_file'''])

           with open(UpperCAmelCase__   ,					'''w'''   ,					encoding='''utf-8''') as f:
                  f.write(json.dumps(self.encoder   ,					indent=2   ,					sort_keys=UpperCAmelCase__   ,					ensure_ascii=UpperCAmelCase__) + '''\n''')

           A__ 					=       0
           with open(UpperCAmelCase__   ,					'''w'''   ,					encoding='''utf-8''') as writer:
                  writer.write('''#version: 0.2\n''')
                  for bpe_tokens, token_index in sorted(self.bpe_ranks.items()   ,					key=lambda UpperCAmelCase__: kv[1]):
                         if index != token_index:
                                logger.warning(
                                    f"""Saving vocabulary to {merge_file}: BPE merge indices are not consecutive."""
                                    ''' Please check that the tokenizer is not corrupted!''')
                                A__ 					=       token_index
                         writer.write(''' '''.join(UpperCAmelCase__) + '''\n''')
                         index += 1

           return vocab_file, merge_file


    def 			SCREAMING_SNAKE_CASE				(     self :      Union[str, Any]   ,					UpperCAmelCase__ :      List[int]   ,					UpperCAmelCase__ :      Optional[List[int]] = None)		->List[int]:





           '''simple docstring'''

           if token_ids_a is None:
                  return [self.cls_token_id] + token_ids_a + [self.sep_token_id]
           A__ 					=       [self.cls_token_id]
           A__ 					=       [self.sep_token_id]
           return cls + token_ids_a + sep + sep + token_ids_a + sep


    def 			SCREAMING_SNAKE_CASE				(     self :      Optional[int]   ,					UpperCAmelCase__ :      List[int]   ,					UpperCAmelCase__ :      Optional[List[int]] = None   ,					UpperCAmelCase__ :      bool = False)		->List[int]:





           '''simple docstring'''

           if already_has_special_tokens:
                  return super().get_special_tokens_mask(
                      token_ids_a=UpperCAmelCase__   ,					token_ids_a=UpperCAmelCase__   ,					already_has_special_tokens=UpperCAmelCase__)

           if token_ids_a is None:
                  return [1] + ([0] * len(UpperCAmelCase__)) + [1]
           return [1] + ([0] * len(UpperCAmelCase__)) + [1, 1] + ([0] * len(UpperCAmelCase__)) + [1]


    def 			SCREAMING_SNAKE_CASE				(     self :      Union[str, Any]   ,					UpperCAmelCase__ :      List[int]   ,					UpperCAmelCase__ :      Optional[List[int]] = None)		->List[int]:





           '''simple docstring'''

           A__ 					=       [self.sep_token_id]
           A__ 					=       [self.cls_token_id]

           if token_ids_a is None:
                  return len(cls + token_ids_a + sep) * [0]
           return len(cls + token_ids_a + sep + sep + token_ids_a + sep) * [0]





    def 			SCREAMING_SNAKE_CASE				(     self :      str   ,					UpperCAmelCase__ :      Any   ,					UpperCAmelCase__ :      Union[str, Any]=False   ,					**UpperCAmelCase__ :      int)		->Optional[int]:





           '''simple docstring'''

           A__ 					=       kwargs.pop('''add_prefix_space'''   ,					self.add_prefix_space)
           if (is_split_into_words or add_prefix_space) and (len(UpperCAmelCase__) > 0 and not text[0].isspace()):
                  A__ 					=       ''' ''' + text
           return (text, kwargs)






"""simple docstring"""


def    _lowerCamelCase   (     lowerCamelCase__	:							Optional[Any]  ):
 lowercase__       :       List[str]				=						len(lowerCamelCase__  )
 lowercase__       :       Optional[int]				=						sum(lowerCamelCase__  )

 lowercase__       :       Optional[int]				=						[[False for x in range(s + 1  )] for y in range(n + 1  )]

 for i in range(1       ,		n + 1  ):
  lowercase__       :       int				=						True

 for i in range(1       ,		s + 1  ):
  lowercase__       :       int				=						False

 for i in range(1       ,		n + 1  ):
  for j in range(1       ,		s + 1  ):
   lowercase__       :       Optional[Any]				=						dp[i][j - 1]

   if arr[i - 1] <= j:
    lowercase__       :       int				=						dp[i][j] or dp[i - 1][j - arr[i - 1]]

 for j in range(int(s / 2  )       ,		-1       ,		-1  ):
  if dp[n][j] is True:
   lowercase__       :       List[Any]				=						s - 2 * j
   break

 return diff