



from __future__ import annotations

import random
from collections.abc import Iterable

class 			__snake_case   :







							'''simple docstring'''






							def __init__(				self	,	a_		):
											a__					   =		{literal: None for literal in literals}


							def __str__(				self		):
											return "{" + " , ".join(self.literals		) + "}"


							def __len__(				self		):
											return len(self.literals		)


							def _a   (				self	,	a_		):
											for literal in self.literals:
															a__					   =		literal[:2]
															if symbol in model:
																			a__					   =		model[symbol]
															else:
																			continue
															if value is not None:
																			# Complement assignment if literal is in complemented form
																			if literal.endswith("""'"""		):
																							a__					   =		not value
															a__					   =		value







							def _a   (				self	,	a_		):
											for literal in self.literals:
															a__					   =		literal.rstrip("""'"""		) if literal.endswith("""'"""		) else literal + """'"""
															if symbol in self.literals:
																			return True

											self.assign(a_		)
											for value in self.literals.values():
															if value in (True, None):
																			return value
											return any(self.literals.values()		)




class 			__snake_case   :







							'''simple docstring'''






							def __init__(				self	,	a_		):
											a__					   =		list(a_		)







							def __str__(				self		):
											return "{" + " , ".join(str(a_		) for clause in self.clauses		) + "}"




def       A_   (						):

				"""simple docstring"""
				a__					   =		[]
				a__					   =		random.randint(1			,		5		)
				a__					   =		"""A"""
				a__					   =		0
				while i < no_of_literals:
								a__					   =		random.randint(1			,		5		)
								a__					   =		base_var + str(__a		)
								a__					   =		random.randint(0			,		1		)
								if var_complement == 1:
												var_name += "'"
								if var_name in literals:
												i -= 1
								else:
												literals.append(__a		)
								i += 1
				return Clause(__a		)

def       A_   (						):

				"""simple docstring"""
				a__					   =		set()
				a__					   =		random.randint(1			,		10		)
				while len(__a		) < no_of_clauses:
								clauses.add(generate_clause()		)
				return Formula(__a		)

def       A_   (						__a  :					Formula		):

				"""simple docstring"""
				a__					   =		formula.clauses
				a__					   =		[]
				for clause in formula.clauses:
								for literal in clause.literals:
												a__					   =		literal[:2]
												if symbol not in symbols_set:
																symbols_set.append(__a		)
				return clauses, symbols_set

def       A_   (						__a  :					list[Clause]			,		__a  :					list[str]			,		__a  :					dict[str, bool | None]		):

				"""simple docstring"""
				a__					   =		[]
				a__					   =		{}
				a__					   =		[]

				for clause in clauses:
								if clause.evaluate(__a		):
												continue
								for literal in clause.literals:
												literals.append(__a		)

				for s in symbols:
								a__					   =		s + """'"""
								if (s in literals and sym not in literals) or (
								    s not in literals and sym in literals
								):
												pure_symbols.append(__a		)
				for p in pure_symbols:
								a__					   =		None
				for s in pure_symbols:
								a__					   =		s + """'"""
								if s in literals:
												a__					   =		True
								elif sym in literals:
												a__					   =		False
				return pure_symbols, assignment

def       A_   (						__a  :					list[Clause]			,		__a  :					dict[str, bool | None]		):

				"""simple docstring"""
				a__					   =		[]
				for clause in clauses:
								if len(__a		) == 1:
												unit_symbols.append(list(clause.literals.keys()		)[0]		)
								else:
												a__   ,      a__					   =		0, 0
												for literal, value in clause.literals.items():
																if value is False:
																				f_count += 1
																elif value is None:
																				a__					   =		literal
																				n_count += 1
												if f_count == len(__a		) - 1 and n_count == 1:
																unit_symbols.append(__a		)
				a__					   =		{}
				for i in unit_symbols:
								a__					   =		i[:2]
								a__					   =		len(__a		) == 2
				a__					   =		[i[:2] for i in unit_symbols]

				return unit_symbols, assignment

def       A_   (						__a  :					list[Clause]			,		__a  :					list[str]			,		__a  :					dict[str, bool | None]		):

				"""simple docstring"""
				a__					   =		True
				for clause in clauses:
								a__					   =		clause.evaluate(__a		)
								if clause_check is False:
												return False, None
								elif clause_check is None:
												a__					   =		False
												continue

				if check_clause_all_true:
								return True, model

				try:
								a__   ,      a__					   =		find_pure_symbols(__a			,		__a			,		__a		)
				except RecursionError:
								print("""raises a RecursionError and is"""		)
								return None, {}
				a__					   =		None
				if len(__a		) > 0:
								a__   ,      a__					   =		pure_symbols[0], assignment[pure_symbols[0]]

				if p:
								a__					   =		model
								a__					   =		value
								a__					   =		list(__a		)
								if p in tmp_symbols:
												tmp_symbols.remove(__a		)
								return dpll_algorithm(__a			,		__a			,		__a		)

				a__   ,      a__					   =		find_unit_clauses(__a			,		__a		)
				a__					   =		None
				if len(__a		) > 0:
								a__   ,      a__					   =		unit_symbols[0], assignment[unit_symbols[0]]
				if p:
								a__					   =		model
								a__					   =		value
								a__					   =		list(__a		)
								if p in tmp_symbols:
												tmp_symbols.remove(__a		)
								return dpll_algorithm(__a			,		__a			,		__a		)
				a__					   =		symbols[0]
				a__					   =		symbols[1:]
				a__   ,      a__					   =		model, model
				a__   ,      a__					   =		True, False

				return dpll_algorithm(__a			,		__a			,		__a		) or dpll_algorithm(__a			,		__a			,		__a		)


if __name__ == "__main__":
	import doctest

	doctest.testmod()

	UpperCAmelCase							=       generate_formula()
	print(f"""The formula {formula} is""", end=""" """)

	UpperCAmelCase			,							UpperCAmelCase							=       generate_parameters(formula)
	UpperCAmelCase			,							UpperCAmelCase							=       dpll_algorithm(clauses, symbols, {})

	if solution:
		print(f"""satisfiable with the assignment {model}.""")
	else:
		print("""not satisfiable.""")






import functools
import math

import flax.linen as nn
import jax
import jax.numpy as jnp

def       A_   (						__a  :					str			,		__a  :					int			,		__a  :					List[Any]			,		__a  :					Dict			,		__a  :					int = 4_096		):

				"""simple docstring"""
				a__   ,      a__   ,      a__					   =		key.shape[-3:]
				a__					   =		value.shape[-1]
				a__					   =		min(__a			,		__a		)
				a__					   =		query / jnp.sqrt(__a		)

				@functools.partial(jax.checkpoint			,		prevent_cse=__a		)
				def summarize_chunk(__a  :					Optional[Any]			,		__a  :					Tuple			,		__a  :					Dict		):
								a__					   =		jnp.einsum("""...qhd,...khd->...qhk"""			,		__a			,		__a			,		precision=__a		)

								a__					   =		jnp.max(__a			,		axis=-1			,		keepdims=__a		)
								a__					   =		jax.lax.stop_gradient(__a		)
								a__					   =		jnp.exp(attn_weights - max_score		)

								a__					   =		jnp.einsum("""...vhf,...qhv->...qhf"""			,		__a			,		__a			,		precision=__a		)
								a__					   =		jnp.einsum("""...qhk->...qh"""			,		__a		)

								return (exp_values, exp_weights.sum(axis=-1		), max_score)

				def chunk_scanner(__a  :					Tuple		):
								# julienne key array
								a__					   =		jax.lax.dynamic_slice(
								    operand=__a			,		start_indices=[0] * (key.ndim - 3) + [chunk_idx, 0, 0]			,		slice_sizes=list(key.shape[:-3]		) + [key_chunk_size, num_heads, k_features]			,		)

								# julienne value array
								a__					   =		jax.lax.dynamic_slice(
								    operand=__a			,		start_indices=[0] * (value.ndim - 3) + [chunk_idx, 0, 0]			,		slice_sizes=list(value.shape[:-3]		) + [key_chunk_size, num_heads, v_features]			,		)

								return summarize_chunk(__a			,		__a			,		__a		)

				a__   ,      a__   ,      a__					   =		jax.lax.map(f=__a			,		xs=jnp.arange(0			,		__a			,		__a		)		)

				a__					   =		jnp.max(__a			,		axis=0			,		keepdims=__a		)
				a__					   =		jnp.exp(chunk_max - global_max		)

				chunk_values *= jnp.expand_dims(__a			,		axis=-1		)
				chunk_weights *= max_diffs

				a__					   =		chunk_values.sum(axis=0		)
				a__					   =		jnp.expand_dims(__a			,		-1		).sum(axis=0		)

				return all_values / all_weights

def       A_   (						__a  :					Tuple			,		__a  :					List[Any]			,		__a  :					int			,		__a  :					List[str]=jax.lax.Precision.HIGHEST			,		__a  :					int = 1_024			,		__a  :					int = 4_096		):

				"""simple docstring"""
				a__   ,      a__   ,      a__					   =		query.shape[-3:]

				def chunk_scanner(__a  :					List[str]			,		__a  :					List[str]		):
								# julienne query array
								a__					   =		jax.lax.dynamic_slice(
								    operand=__a			,		start_indices=([0] * (query.ndim - 3)) + [chunk_idx, 0, 0]			,		slice_sizes=list(query.shape[:-3]		) + [min(__a			,		__a		), num_heads, q_features]			,		)

								return (
								    chunk_idx + query_chunk_size,  # unused ignore it
								    _query_chunk_attention(
								        query=__a			,		key=__a			,		value=__a			,		precision=__a			,		key_chunk_size=__a		),
								)

				a__   ,      a__					   =		jax.lax.scan(
				    f=__a			,		init=0			,		xs=__a			,		length=math.ceil(num_q / query_chunk_size		)		)

				return jnp.concatenate(__a			,		axis=-3		)  # fuse the chunked result back

class 			__snake_case   ( nn.Module):







							'''simple docstring'''






							UpperCamelCase__					:   int
							UpperCamelCase__					:   int       =       8
							UpperCamelCase__					:   int       =       6_4
							UpperCamelCase__					:   float       =       0.0
							UpperCamelCase__					:   bool       =       False
							UpperCamelCase__					:   jnp.dtype       =       jnp.floataa


							def _a   (				self		):
											a__					   =		self.dim_head * self.heads
											a__					   =		self.dim_head**-0.5

											# Weights were exported with old names {to_q, to_k, to_v, to_out}
											a__					   =		nn.Dense(a_	,	use_bias=a_	,	dtype=self.dtype	,	name="""to_q"""		)
											a__					   =		nn.Dense(a_	,	use_bias=a_	,	dtype=self.dtype	,	name="""to_k"""		)
											a__					   =		nn.Dense(a_	,	use_bias=a_	,	dtype=self.dtype	,	name="""to_v"""		)

											a__					   =		nn.Dense(self.query_dim	,	dtype=self.dtype	,	name="""to_out_0"""		)
											a__					   =		nn.Dropout(rate=self.dropout		)


							def _a   (				self	,	a_		):
											a__   ,      a__   ,      a__					   =		tensor.shape
											a__					   =		self.heads
											a__					   =		tensor.reshape(a_	,	a_	,	a_	,	dim // head_size		)
											a__					   =		jnp.transpose(a_	,	(0, 2, 1, 3)		)
											a__					   =		tensor.reshape(batch_size * head_size	,	a_	,	dim // head_size		)
											return tensor


							def _a   (				self	,	a_		):
											a__   ,      a__   ,      a__					   =		tensor.shape
											a__					   =		self.heads
											a__					   =		tensor.reshape(batch_size // head_size	,	a_	,	a_	,	a_		)
											a__					   =		jnp.transpose(a_	,	(0, 2, 1, 3)		)
											a__					   =		tensor.reshape(batch_size // head_size	,	a_	,	dim * head_size		)
											return tensor







							def __call__(				self	,	a_	,	a_=None	,	a_=True		):
											a__					   =		hidden_states if context is None else context

											a__					   =		self.query(a_		)
											a__					   =		self.key(a_		)
											a__					   =		self.value(a_		)

											a__					   =		self.reshape_heads_to_batch_dim(a_		)
											a__					   =		self.reshape_heads_to_batch_dim(a_		)
											a__					   =		self.reshape_heads_to_batch_dim(a_		)

											if self.use_memory_efficient_attention:
															a__					   =		query_states.transpose(1	,	0	,	2		)
															a__					   =		key_states.transpose(1	,	0	,	2		)
															a__					   =		value_states.transpose(1	,	0	,	2		)

															# this if statement create a chunk size for each layer of the unet
															# the chunk size is equal to the query_length dimension of the deepest layer of the unet

															a__					   =		query_states.shape[-3]
															if flatten_latent_dim % 64 == 0:
																			a__					   =		int(flatten_latent_dim / 64		)
															elif flatten_latent_dim % 16 == 0:
																			a__					   =		int(flatten_latent_dim / 16		)
															elif flatten_latent_dim % 4 == 0:
																			a__					   =		int(flatten_latent_dim / 4		)
															else:
																			a__					   =		int(a_		)

															a__					   =		jax_memory_efficient_attention(
															    a_	,	a_	,	a_	,	query_chunk_size=a_	,	key_chunk_size=4_096 * 4		)

															a__					   =		hidden_states.transpose(1	,	0	,	2		)
											else:
															# compute attentions
															a__					   =		jnp.einsum("""b i d, b j d->b i j"""	,	a_	,	a_		)
															a__					   =		attention_scores * self.scale
															a__					   =		nn.softmax(a_	,	axis=2		)

															# attend to values
															a__					   =		jnp.einsum("""b i j, b j d -> b i d"""	,	a_	,	a_		)

											a__					   =		self.reshape_batch_dim_to_heads(a_		)
											a__					   =		self.proj_attn(a_		)
											return self.dropout_layer(a_	,	deterministic=a_		)




class 			__snake_case   ( nn.Module):







							'''simple docstring'''






							UpperCamelCase__					:   int
							UpperCamelCase__					:   int
							UpperCamelCase__					:   int
							UpperCamelCase__					:   float       =       0.0
							UpperCamelCase__					:   bool       =       False
							UpperCamelCase__					:   jnp.dtype       =       jnp.floataa
							UpperCamelCase__					:   bool       =       False


							def _a   (				self		):
											# self attention (or cross_attention if only_cross_attention is True)
											a__					   =		FlaxAttention(
											    self.dim	,	self.n_heads	,	self.d_head	,	self.dropout	,	self.use_memory_efficient_attention	,	dtype=self.dtype		)
											# cross attention
											a__					   =		FlaxAttention(
											    self.dim	,	self.n_heads	,	self.d_head	,	self.dropout	,	self.use_memory_efficient_attention	,	dtype=self.dtype		)
											a__					   =		FlaxFeedForward(dim=self.dim	,	dropout=self.dropout	,	dtype=self.dtype		)
											a__					   =		nn.LayerNorm(epsilon=1E-5	,	dtype=self.dtype		)
											a__					   =		nn.LayerNorm(epsilon=1E-5	,	dtype=self.dtype		)
											a__					   =		nn.LayerNorm(epsilon=1E-5	,	dtype=self.dtype		)
											a__					   =		nn.Dropout(rate=self.dropout		)







							def __call__(				self	,	a_	,	a_	,	a_=True		):
											# self attention
											a__					   =		hidden_states
											if self.only_cross_attention:
															a__					   =		self.attna(self.norma(a_		)	,	a_	,	deterministic=a_		)
											else:
															a__					   =		self.attna(self.norma(a_		)	,	deterministic=a_		)
											a__					   =		hidden_states + residual

											# cross attention
											a__					   =		hidden_states
											a__					   =		self.attna(self.norma(a_		)	,	a_	,	deterministic=a_		)
											a__					   =		hidden_states + residual

											# feed forward
											a__					   =		hidden_states
											a__					   =		self.ff(self.norma(a_		)	,	deterministic=a_		)
											a__					   =		hidden_states + residual

											return self.dropout_layer(a_	,	deterministic=a_		)




class 			__snake_case   ( nn.Module):







							'''simple docstring'''






							UpperCamelCase__					:   int
							UpperCamelCase__					:   int
							UpperCamelCase__					:   int
							UpperCamelCase__					:   int       =       1
							UpperCamelCase__					:   float       =       0.0
							UpperCamelCase__					:   bool       =       False
							UpperCamelCase__					:   bool       =       False
							UpperCamelCase__					:   jnp.dtype       =       jnp.floataa
							UpperCamelCase__					:   bool       =       False


							def _a   (				self		):
											a__					   =		nn.GroupNorm(num_groups=32	,	epsilon=1E-5		)

											a__					   =		self.n_heads * self.d_head
											if self.use_linear_projection:
															a__					   =		nn.Dense(a_	,	dtype=self.dtype		)
											else:
															a__					   =		nn.Conv(
															    a_	,	kernel_size=(1, 1)	,	strides=(1, 1)	,	padding="""VALID"""	,	dtype=self.dtype	,	)

											a__					   =		[
											    FlaxBasicTransformerBlock(
											        a_	,	self.n_heads	,	self.d_head	,	dropout=self.dropout	,	only_cross_attention=self.only_cross_attention	,	dtype=self.dtype	,	use_memory_efficient_attention=self.use_memory_efficient_attention	,	)
											    for _ in range(self.depth		)
											]

											if self.use_linear_projection:
															a__					   =		nn.Dense(a_	,	dtype=self.dtype		)
											else:
															a__					   =		nn.Conv(
															    a_	,	kernel_size=(1, 1)	,	strides=(1, 1)	,	padding="""VALID"""	,	dtype=self.dtype	,	)

											a__					   =		nn.Dropout(rate=self.dropout		)







							def __call__(				self	,	a_	,	a_	,	a_=True		):
											a__   ,      a__   ,      a__   ,      a__					   =		hidden_states.shape
											a__					   =		hidden_states
											a__					   =		self.norm(a_		)
											if self.use_linear_projection:
															a__					   =		hidden_states.reshape(a_	,	height * width	,	a_		)
															a__					   =		self.proj_in(a_		)
											else:
															a__					   =		self.proj_in(a_		)
															a__					   =		hidden_states.reshape(a_	,	height * width	,	a_		)

											for transformer_block in self.transformer_blocks:
															a__					   =		transformer_block(a_	,	a_	,	deterministic=a_		)

											if self.use_linear_projection:
															a__					   =		self.proj_out(a_		)
															a__					   =		hidden_states.reshape(a_	,	a_	,	a_	,	a_		)
											else:
															a__					   =		hidden_states.reshape(a_	,	a_	,	a_	,	a_		)
															a__					   =		self.proj_out(a_		)

											a__					   =		hidden_states + residual
											return self.dropout_layer(a_	,	deterministic=a_		)




class 			__snake_case   ( nn.Module):







							'''simple docstring'''






							UpperCamelCase__					:   int
							UpperCamelCase__					:   float       =       0.0
							UpperCamelCase__					:   jnp.dtype       =       jnp.floataa


							def _a   (				self		):
											# The second linear layer needs to be called
											# net_2 for now to match the index of the Sequential layer
											a__					   =		FlaxGEGLU(self.dim	,	self.dropout	,	self.dtype		)
											a__					   =		nn.Dense(self.dim	,	dtype=self.dtype		)







							def __call__(				self	,	a_	,	a_=True		):
											a__					   =		self.net_a(a_	,	deterministic=a_		)
											a__					   =		self.net_a(a_		)
											return hidden_states




class 			__snake_case   ( nn.Module):







							'''simple docstring'''






							UpperCamelCase__					:   int
							UpperCamelCase__					:   float       =       0.0
							UpperCamelCase__					:   jnp.dtype       =       jnp.floataa


							def _a   (				self		):
											a__					   =		self.dim * 4
											a__					   =		nn.Dense(inner_dim * 2	,	dtype=self.dtype		)
											a__					   =		nn.Dropout(rate=self.dropout		)







							def __call__(				self	,	a_	,	a_=True		):
											a__					   =		self.proj(a_		)
											a__   ,      a__					   =		jnp.split(a_	,	2	,	axis=2		)
											return self.dropout_layer(hidden_linear * nn.gelu(a_		)	,	deterministic=a_		)

