


"""simple docstring"""


from collections.abc import Sequence
from queue import Queue
class 						_UpperCamelCase						:
							'''simple docstring'''







							def __init__(  self					,     __a					,     __a					,     __a					,     __a=None					,     __a=None			):
										__lowerCAmelCase       					=    start
										__lowerCAmelCase       					=    end
										__lowerCAmelCase       					=    val
										__lowerCAmelCase       					=    (start + end) // 2
										__lowerCAmelCase       					=    left
										__lowerCAmelCase       					=    right



							def __repr__(  self			):
										return f"SegmentTreeNode(start={self.start}, end={self.end}, val={self.val})"
class 						_UpperCamelCase						:
							'''simple docstring'''







							def __init__(  self					,     __a					,     __a			):
										__lowerCAmelCase       					=    collection
										__lowerCAmelCase       					=    function
										if self.collection:
													__lowerCAmelCase       					=    self._build_tree(0					,     len(snake_case__			) - 1			)

							def     snake_case       (  self					,     __a					,     __a			):
										self._update_tree(self.root					,     snake_case__					,     snake_case__			)

							def     snake_case       (  self					,     __a					,     __a			):
										return self._query_range(self.root					,     snake_case__					,     snake_case__			)

							def     snake_case       (  self					,     __a					,     __a			):
										if start == end:
													return SegmentTreeNode(snake_case__					,     snake_case__					,     self.collection[start]			)
										__lowerCAmelCase       					=    (start + end) // 2
										__lowerCAmelCase       					=    self._build_tree(snake_case__					,     snake_case__			)
										__lowerCAmelCase       					=    self._build_tree(mid + 1					,     snake_case__			)
										return SegmentTreeNode(snake_case__					,     snake_case__					,     self.fn(left.val					,     right.val			)					,     snake_case__					,     snake_case__			)

							def     snake_case       (  self					,     __a					,     __a					,     __a			):
										if node.start == i and node.end == i:
													__lowerCAmelCase       					=    val
													return
										if i <= node.mid:
													self._update_tree(node.left					,     snake_case__					,     snake_case__			)
										else:
													self._update_tree(node.right					,     snake_case__					,     snake_case__			)
										__lowerCAmelCase       					=    self.fn(node.left.val					,     node.right.val			)

							def     snake_case       (  self					,     __a					,     __a					,     __a			):
										if node.start == i and node.end == j:
													return node.val

										if i <= node.mid:
													if j <= node.mid:
																# range in left child tree
																return self._query_range(node.left					,     snake_case__					,     snake_case__			)
													else:
																# range in left child tree and right child tree
																return self.fn(
																    self._query_range(node.left					,     snake_case__					,     node.mid			)					,     self._query_range(node.right					,     node.mid + 1					,     snake_case__			)					,     )
										else:
													# range in right child tree
													return self._query_range(node.right					,     snake_case__					,     snake_case__			)



							def     snake_case       (  self			):
										if self.root is not None:
													__lowerCAmelCase       					=    Queue()
													queue.put(self.root			)
													while not queue.empty():
																__lowerCAmelCase       					=    queue.get()
																yield node

																if node.left is not None:
																			queue.put(node.left			)

																if node.right is not None:
																			queue.put(node.right			)


if __name__ == "__main__":
	import operator

	for fn in [operator.add, max, min]:
		print("*" * 5_0)
		A  :     Tuple										=    SegmentTree([2, 1, 5, 3, 4], fn)
		for node in arr.traverse():
			print(node)
		print()

		arr.update(1, 5)
		for node in arr.traverse():
			print(node)
		print()

		print(arr.query_range(3, 4))  # 7
		print(arr.query_range(2, 2))  # 5
		print(arr.query_range(1, 3))  # 13
		print()








"""simple docstring"""


import tensorflow as tf

from ...tf_utils import shape_list
class 						_UpperCamelCase						(     tf.keras.layers.Layer	):
							'''simple docstring'''







							def __init__(  self					,     __a					,     __a					,     __a					,     __a					,     __a=1					,     __a=False					,     **__a			):
										super().__init__(**__a			)

										__lowerCAmelCase       					=    vocab_size
										__lowerCAmelCase       					=    d_embed
										__lowerCAmelCase       					=    d_proj

										__lowerCAmelCase       					=    cutoffs + [vocab_size]
										__lowerCAmelCase       					=    [0] + self.cutoffs
										__lowerCAmelCase       					=    div_val

										__lowerCAmelCase       					=    self.cutoffs[0]
										__lowerCAmelCase       					=    len(self.cutoffs			) - 1
										__lowerCAmelCase       					=    self.shortlist_size + self.n_clusters
										__lowerCAmelCase       					=    keep_order

										__lowerCAmelCase       					=    []
										__lowerCAmelCase       					=    []

							def     snake_case       (  self					,     __a			):
										if self.n_clusters > 0:
													__lowerCAmelCase       					=    self.add_weight(
													    shape=(self.n_clusters, self.d_embed)					,     initializer="zeros"					,     trainable=__a					,     name="cluster_weight"			)
													__lowerCAmelCase       					=    self.add_weight(
													    shape=(self.n_clusters,)					,     initializer="zeros"					,     trainable=__a					,     name="cluster_bias"			)

										if self.div_val == 1:
													for i in range(len(self.cutoffs			)			):
																if self.d_proj != self.d_embed:
																			__lowerCAmelCase       					=    self.add_weight(
																			    shape=(self.d_embed, self.d_proj)					,     initializer="zeros"					,     trainable=__a					,     name=f"out_projs_._{i}"					,     )
																			self.out_projs.append(__a			)
																else:
																			self.out_projs.append(__a			)
																__lowerCAmelCase       					=    self.add_weight(
																    shape=(self.vocab_size, self.d_embed)					,     initializer="zeros"					,     trainable=__a					,     name=f"out_layers_._{i}_._weight"					,     )
																__lowerCAmelCase       					=    self.add_weight(
																    shape=(self.vocab_size,)					,     initializer="zeros"					,     trainable=__a					,     name=f"out_layers_._{i}_._bias"					,     )
																self.out_layers.append((weight, bias)			)
										else:
													for i in range(len(self.cutoffs			)			):
																__lowerCAmelCase					,			__lowerCAmelCase       					=    self.cutoff_ends[i], self.cutoff_ends[i + 1]
																__lowerCAmelCase       					=    self.d_embed // (self.div_val**i)

																__lowerCAmelCase       					=    self.add_weight(
																    shape=(d_emb_i, self.d_proj)					,     initializer="zeros"					,     trainable=__a					,     name=f"out_projs_._{i}"			)
																self.out_projs.append(__a			)
																__lowerCAmelCase       					=    self.add_weight(
																    shape=(r_idx - l_idx, d_emb_i)					,     initializer="zeros"					,     trainable=__a					,     name=f"out_layers_._{i}_._weight"					,     )
																__lowerCAmelCase       					=    self.add_weight(
																    shape=(r_idx - l_idx,)					,     initializer="zeros"					,     trainable=__a					,     name=f"out_layers_._{i}_._bias"					,     )
																self.out_layers.append((weight, bias)			)
										super().build(__a			)

							@staticmethod
							def     snake_case       (  __a					,     __a					,     __a					,     __a=None			):
										__lowerCAmelCase       					=    x
										if proj is not None:
													__lowerCAmelCase       					=    tf.einsum("ibd,ed->ibe"					,     __a					,     __a			)
										return tf.einsum("ibd,nd->ibn"					,     __a					,     __a			) + b

							@staticmethod
							def     snake_case       (  __a					,     __a			):
										__lowerCAmelCase       					=    shape_list(__a			)
										__lowerCAmelCase       					=    tf.range(lp_size[0]					,     dtype=target.dtype			)
										__lowerCAmelCase       					=    tf.stack([r, target]					,     1			)
										return tf.gather_nd(__a					,     __a			)



							def     snake_case       (  self					,     __a					,     __a					,     __a=True					,     __a=False			):
										__lowerCAmelCase       					=    0
										if self.n_clusters == 0:
													__lowerCAmelCase       					=    self._logit(__a					,     self.out_layers[0][0]					,     self.out_layers[0][1]					,     self.out_projs[0]			)
													if target is not None:
																__lowerCAmelCase       					=    tf.nn.sparse_softmax_cross_entropy_with_logits(labels=__a					,     logits=__a			)
													__lowerCAmelCase       					=    tf.nn.log_softmax(__a					,     axis=-1			)
										else:
													__lowerCAmelCase       					=    shape_list(__a			)
													__lowerCAmelCase       					=    []
													__lowerCAmelCase       					=    tf.zeros(hidden_sizes[:2]			)
													for i in range(len(self.cutoffs			)			):
																__lowerCAmelCase					,			__lowerCAmelCase       					=    self.cutoff_ends[i], self.cutoff_ends[i + 1]
																if target is not None:
																			__lowerCAmelCase       					=    (target >= l_idx) & (target < r_idx)
																			__lowerCAmelCase       					=    tf.where(__a			)
																			__lowerCAmelCase       					=    tf.boolean_mask(__a					,     __a			) - l_idx

																if self.div_val == 1:
																			__lowerCAmelCase       					=    self.out_layers[0][0][l_idx:r_idx]
																			__lowerCAmelCase       					=    self.out_layers[0][1][l_idx:r_idx]
																else:
																			__lowerCAmelCase       					=    self.out_layers[i][0]
																			__lowerCAmelCase       					=    self.out_layers[i][1]

																if i == 0:
																			__lowerCAmelCase       					=    tf.concat([cur_W, self.cluster_weight]					,     0			)
																			__lowerCAmelCase       					=    tf.concat([cur_b, self.cluster_bias]					,     0			)

																			__lowerCAmelCase       					=    self._logit(__a					,     __a					,     __a					,     self.out_projs[0]			)
																			__lowerCAmelCase       					=    tf.nn.log_softmax(__a			)
																			out.append(head_logprob[..., : self.cutoffs[0]]			)
																			if target is not None:
																						__lowerCAmelCase       					=    tf.boolean_mask(__a					,     __a			)
																						__lowerCAmelCase       					=    self._gather_logprob(__a					,     __a			)
																else:
																			__lowerCAmelCase       					=    self._logit(__a					,     __a					,     __a					,     self.out_projs[i]			)
																			__lowerCAmelCase       					=    tf.nn.log_softmax(__a			)
																			__lowerCAmelCase       					=    self.cutoffs[0] + i - 1  # No probability for the head cluster
																			__lowerCAmelCase       					=    head_logprob[..., cluster_prob_idx, None] + tail_logprob
																			out.append(__a			)
																			if target is not None:
																						__lowerCAmelCase       					=    tf.boolean_mask(__a					,     __a			)
																						__lowerCAmelCase       					=    tf.boolean_mask(__a					,     __a			)
																						__lowerCAmelCase       					=    self._gather_logprob(__a					,     __a			)
																						cur_logprob += cur_head_logprob[:, self.cutoff_ends[1] + i - 1]
																if target is not None:
																			loss += tf.scatter_nd(__a					,     -cur_logprob					,     shape_list(__a			)			)
													__lowerCAmelCase       					=    tf.concat(__a					,     axis=-1			)

										if target is not None:
													if return_mean:
																__lowerCAmelCase       					=    tf.reduce_mean(__a			)
													# Add the training-time loss value to the layer using `self.add_loss()`.
													self.add_loss(__a			)

													# Log the loss as a metric (we could log arbitrary metrics,
													# including different metrics for training and inference.
													self.add_metric(__a					,     name=self.name					,     aggregation="mean" if return_mean else ""			)

										return out




