



from __future__ import annotations

from random import random
from typing import Generic, TypeVar

A__	      =       TypeVar("""KT""")
A__	      =       TypeVar("""VT""")





class 					__lowerCAmelCase (     Generic[KT, VT]       ):




				def __init__(							self						,				_snake_case = "root"						,				_snake_case = None		):



									"""simple docstring"""





									_lowerCAmelCase						=    key
									_lowerCAmelCase						=    value
									_lowerCAmelCase						=    []




				def __repr__(							self		):



									"""simple docstring"""





									return F'Node({self.key}: {self.value})'




				@property
				def 							snake_case   (							self		):



									"""simple docstring"""





									return len(self.forward		)





class 					__lowerCAmelCase (     Generic[KT, VT]       ):




				def __init__(							self						,				_snake_case = 0.5						,				_snake_case = 16		):



									"""simple docstring"""





									_lowerCAmelCase						=    Node[KT, VT]()
									_lowerCAmelCase						=    0
									_lowerCAmelCase						=    p
									_lowerCAmelCase						=    max_level




				def __str__(							self		):



									"""simple docstring"""





									_lowerCAmelCase						=    list(self		)

									if len(_snake_case		) == 0:
														return F'SkipList(level={self.level})'

									_lowerCAmelCase						=    max((len(str(_snake_case		)		) for item in items)						,				default=4		)
									_lowerCAmelCase						=    max(_snake_case						,				4		) + 4

									_lowerCAmelCase						=    self.head
									_lowerCAmelCase						=    []

									_lowerCAmelCase						=    node.forward.copy()
									lines.append(F'[{node.key}]'.ljust(_snake_case						,				"""-"""		) + """* """ * len(_snake_case		)		)
									lines.append(""" """ * label_size + """| """ * len(_snake_case		)		)

									while len(node.forward		) != 0:
														_lowerCAmelCase						=    node.forward[0]

														lines.append(
														    F'[{node.key}]'.ljust(_snake_case						,				"""-"""		)
														    + """ """.join(str(n.key		) if n.key == node.key else """|""" for n in forwards		)		)
														lines.append(""" """ * label_size + """| """ * len(_snake_case		)		)
														_lowerCAmelCase						=    node.forward

									lines.append("""None""".ljust(_snake_case		) + """* """ * len(_snake_case		)		)
									return F'SkipList(level={self.level})\n' + "\n".join(_snake_case		)




				def __iter__(							self		):



									"""simple docstring"""





									_lowerCAmelCase						=    self.head

									while len(node.forward		) != 0:
														yield node.forward[0].key
														_lowerCAmelCase						=    node.forward[0]




				def 							snake_case   (							self		):



									"""simple docstring"""





									_lowerCAmelCase						=    1
									while random() < self.p and level < self.max_level:
														level += 1

									return level




				def 							snake_case   (							self						,				_snake_case		):



									"""simple docstring"""





									_lowerCAmelCase						=    []

									_lowerCAmelCase						=    self.head

									for i in reversed(range(self.level		)		):
														# i < node.level - When node level is lesser than `i` decrement `i`.
														# node.forward[i].key < key - Jumping to node with key value higher
														#                             or equal to searched key would result
														#                             in skipping searched key.
														while i < node.level and node.forward[i].key < key:
																			_lowerCAmelCase						=    node.forward[i]
														# Each leftmost node (relative to searched node) will potentially have to
														# be updated.
														update_vector.append(_snake_case		)

									update_vector.reverse()  # Note that we were inserting values in reverse order.

									# len(node.forward) != 0 - If current node doesn't contain any further
									#                          references then searched key is not present.
									# node.forward[0].key == key - Next node key should be equal to search key
									#                              if key is present.
									if len(node.forward		) != 0 and node.forward[0].key == key:
														return node.forward[0], update_vector
									else:
														return None, update_vector




				def 							snake_case   (							self						,				_snake_case		):



									"""simple docstring"""





									_lowerCAmelCase	,	_lowerCAmelCase						=    self._locate_node(_snake_case		)

									if node is not None:
														for i, update_node in enumerate(_snake_case		):
																			# Remove or replace all references to removed node.
																			if update_node.level > i and update_node.forward[i].key == key:
																								if node.level > i:
																													_lowerCAmelCase						=    node.forward[i]
																								else:
																													_lowerCAmelCase						=    update_node.forward[:i]




				def 							snake_case   (							self						,				_snake_case						,				_snake_case		):



									"""simple docstring"""





									_lowerCAmelCase	,	_lowerCAmelCase						=    self._locate_node(_snake_case		)
									if node is not None:
														_lowerCAmelCase						=    value
									else:
														_lowerCAmelCase						=    self.random_level()

														if level > self.level:
																			# After level increase we have to add additional nodes to head.
																			for _ in range(self.level - 1						,				_snake_case		):
																								update_vector.append(self.head		)
																			_lowerCAmelCase						=    level

														_lowerCAmelCase						=    Node(_snake_case						,				_snake_case		)

														for i, update_node in enumerate(update_vector[:level]		):
																			# Change references to pass through new node.
																			if update_node.level > i:
																								new_node.forward.append(update_node.forward[i]		)

																			if update_node.level < i + 1:
																								update_node.forward.append(_snake_case		)
																			else:
																								_lowerCAmelCase						=    new_node




				def 							snake_case   (							self						,				_snake_case		):



									"""simple docstring"""





									_lowerCAmelCase	,	_lowerCAmelCase						=    self._locate_node(_snake_case		)

									if node is not None:
														return node.value

									return None


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()
					skip_list.insert("""Key1"""	,						3			)
					skip_list.insert("""Key2"""	,						12			)
					skip_list.insert("""Key3"""	,						41			)
					skip_list.insert("""Key4"""	,						-19			)

					_lowerCAmelCase						=    skip_list.head
					_lowerCAmelCase						=    {}
					while node.level != 0:
										_lowerCAmelCase						=    node.forward[0]
										_lowerCAmelCase						=    node.value

					assert len(snake_case			) == 4
					assert all_values["Key1"] == 3
					assert all_values["Key2"] == 12
					assert all_values["Key3"] == 41
					assert all_values["Key4"] == -19


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()
					skip_list.insert("""Key1"""	,						10			)
					skip_list.insert("""Key1"""	,						12			)

					skip_list.insert("""Key5"""	,						7			)
					skip_list.insert("""Key7"""	,						10			)
					skip_list.insert("""Key10"""	,						5			)

					skip_list.insert("""Key7"""	,						7			)
					skip_list.insert("""Key5"""	,						5			)
					skip_list.insert("""Key10"""	,						10			)

					_lowerCAmelCase						=    skip_list.head
					_lowerCAmelCase						=    {}
					while node.level != 0:
										_lowerCAmelCase						=    node.forward[0]
										_lowerCAmelCase						=    node.value

					if len(snake_case			) != 4:
										print()
					assert len(snake_case			) == 4
					assert all_values["Key1"] == 12
					assert all_values["Key7"] == 7
					assert all_values["Key5"] == 5
					assert all_values["Key10"] == 10


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()
					assert skip_list.find("""Some key"""			) is None


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()

					skip_list.insert("""Key2"""	,						20			)
					assert skip_list.find("""Key2"""			) == 20

					skip_list.insert("""Some Key"""	,						10			)
					skip_list.insert("""Key2"""	,						8			)
					skip_list.insert("""V"""	,						13			)

					assert skip_list.find("""Y"""			) is None
					assert skip_list.find("""Key2"""			) == 8
					assert skip_list.find("""Some Key"""			) == 10
					assert skip_list.find("""V"""			) == 13


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()
					skip_list.delete("""Some key"""			)

					assert len(skip_list.head.forward			) == 0


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()

					skip_list.insert("""Key1"""	,						12			)
					skip_list.insert("""V"""	,						13			)
					skip_list.insert("""X"""	,						14			)
					skip_list.insert("""Key2"""	,						15			)

					skip_list.delete("""V"""			)
					skip_list.delete("""Key2"""			)

					assert skip_list.find("""V"""			) is None
					assert skip_list.find("""Key2"""			) is None


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()

					skip_list.insert("""Key1"""	,						12			)
					skip_list.insert("""V"""	,						13			)
					skip_list.insert("""X"""	,						14			)
					skip_list.insert("""Key2"""	,						15			)

					skip_list.delete("""V"""			)
					assert skip_list.find("""V"""			) is None
					assert skip_list.find("""X"""			) == 14
					assert skip_list.find("""Key1"""			) == 12
					assert skip_list.find("""Key2"""			) == 15

					skip_list.delete("""X"""			)
					assert skip_list.find("""V"""			) is None
					assert skip_list.find("""X"""			) is None
					assert skip_list.find("""Key1"""			) == 12
					assert skip_list.find("""Key2"""			) == 15

					skip_list.delete("""Key1"""			)
					assert skip_list.find("""V"""			) is None
					assert skip_list.find("""X"""			) is None
					assert skip_list.find("""Key1"""			) is None
					assert skip_list.find("""Key2"""			) == 15

					skip_list.delete("""Key2"""			)
					assert skip_list.find("""V"""			) is None
					assert skip_list.find("""X"""			) is None
					assert skip_list.find("""Key1"""			) is None
					assert skip_list.find("""Key2"""			) is None


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()

					skip_list.insert("""Key1"""	,						12			)
					skip_list.insert("""V"""	,						13			)
					skip_list.insert("""X"""	,						1_42			)
					skip_list.insert("""Key2"""	,						15			)

					skip_list.delete("""X"""			)

					def traverse_keys(snake_case			):
										yield node.key
										for forward_node in node.forward:
															yield from traverse_keys(snake_case			)

					assert len(set(traverse_keys(skip_list.head			)			)			) == 4


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					def is_sorted(snake_case			):
										return all(next_item >= item for item, next_item in zip(snake_case	,						lst[1:]			)			)

					_lowerCAmelCase						=    SkipList()
					for i in range(10			):
										skip_list.insert(snake_case	,						snake_case			)
					assert is_sorted(list(snake_case			)			)
					skip_list.delete(5			)
					skip_list.delete(8			)
					skip_list.delete(2			)
					assert is_sorted(list(snake_case			)			)
					skip_list.insert(-12	,						-12			)
					skip_list.insert(77	,						77			)
					assert is_sorted(list(snake_case			)			)


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					for _ in range(1_00			):
										# Repeat test 100 times due to the probabilistic nature of skip list
										# random values == random bugs
										test_insert()
										test_insert_overrides_existing_value()

										test_searching_empty_list_returns_none()
										test_search()

										test_deleting_item_from_empty_list_do_nothing()
										test_deleted_items_are_not_founded_by_find_method()
										test_delete_removes_only_given_key()
										test_delete_doesnt_leave_dead_nodes()

										test_iter_always_yields_sorted_values()


def 		_UpperCAmelCase				(      ):





					"""simple docstring"""

					_lowerCAmelCase						=    SkipList()
					skip_list.insert(2	,						"""2"""			)
					skip_list.insert(4	,						"""4"""			)
					skip_list.insert(6	,						"""4"""			)
					skip_list.insert(4	,						"""5"""			)
					skip_list.insert(8	,						"""4"""			)
					skip_list.insert(9	,						"""4"""			)

					skip_list.delete(4			)

					print(snake_case			)


if __name__ == "__main__":
	import doctest

	doctest.testmod()
	main()









from typing import TYPE_CHECKING

from ...utils import (
    OptionalDependencyNotAvailable,
    _LazyModule,
    is_tf_available,
    is_tokenizers_available,
    is_torch_available,
)


snake_case_ : int    		=       {
    "configuration_deberta": ["DEBERTA_PRETRAINED_CONFIG_ARCHIVE_MAP", "DebertaConfig", "DebertaOnnxConfig"],
    "tokenization_deberta": ["DebertaTokenizer"],
}

try:
    if not is_tokenizers_available():
        raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
    pass
else:
    snake_case_ : int    		=       ["DebertaTokenizerFast"]

try:
    if not is_torch_available():
        raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
    pass
else:
    snake_case_ : List[str]    		=       [
        "DEBERTA_PRETRAINED_MODEL_ARCHIVE_LIST",
        "DebertaForMaskedLM",
        "DebertaForQuestionAnswering",
        "DebertaForSequenceClassification",
        "DebertaForTokenClassification",
        "DebertaModel",
        "DebertaPreTrainedModel",
    ]

try:
    if not is_tf_available():
        raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
    pass
else:
    snake_case_ : Any    		=       [
        "TF_DEBERTA_PRETRAINED_MODEL_ARCHIVE_LIST",
        "TFDebertaForMaskedLM",
        "TFDebertaForQuestionAnswering",
        "TFDebertaForSequenceClassification",
        "TFDebertaForTokenClassification",
        "TFDebertaModel",
        "TFDebertaPreTrainedModel",
    ]


if TYPE_CHECKING:
    from .configuration_deberta import DEBERTA_PRETRAINED_CONFIG_ARCHIVE_MAP, DebertaConfig, DebertaOnnxConfig
    from .tokenization_deberta import DebertaTokenizer

    try:
        if not is_tokenizers_available():
            raise OptionalDependencyNotAvailable()
    except OptionalDependencyNotAvailable:
        pass
    else:
        from .tokenization_deberta_fast import DebertaTokenizerFast

    try:
        if not is_torch_available():
            raise OptionalDependencyNotAvailable()
    except OptionalDependencyNotAvailable:
        pass
    else:
        from .modeling_deberta import (
            DEBERTA_PRETRAINED_MODEL_ARCHIVE_LIST,
            DebertaForMaskedLM,
            DebertaForQuestionAnswering,
            DebertaForSequenceClassification,
            DebertaForTokenClassification,
            DebertaModel,
            DebertaPreTrainedModel,
        )

    try:
        if not is_tf_available():
            raise OptionalDependencyNotAvailable()
    except OptionalDependencyNotAvailable:
        pass
    else:
        from .modeling_tf_deberta import (
            TF_DEBERTA_PRETRAINED_MODEL_ARCHIVE_LIST,
            TFDebertaForMaskedLM,
            TFDebertaForQuestionAnswering,
            TFDebertaForSequenceClassification,
            TFDebertaForTokenClassification,
            TFDebertaModel,
            TFDebertaPreTrainedModel,
        )


else:
    import sys

    snake_case_ : Dict    		=       _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)






