Арсен Жуматай,304 MroC3 12993			Даулетбек Досай 404 группа (КФ) MroC3 12996
t	1	def extract_classes(code):	t	1	def extract_classes(code):
	2	result = {}		2	result = {}
	3	for statement in code.splitlines():		3	for statement in code.splitlines():
	4	statement = statement.strip()		4	statement = statement.strip()
	5	if not statement.startswith('class '):		5	if not statement.startswith('class '):
	6	continue		6	continue
	7	class_name_end = statement.find('(')		7	class_name_end = statement.find('(')
	8	if class_name_end == -1:		8	if class_name_end == -1:
	9	class_name_end = statement.find(':')		9	class_name_end = statement.find(':')
	10	class_name = statement[6:class_name_end].strip()		10	class_name = statement[6:class_name_end].strip()
	11	if '(' in statement:		11	if '(' in statement:
	12	parents_start = statement.find('(') + 1		12	parents_start = statement.find('(') + 1
	13	parents_end = statement.find(')')		13	parents_end = statement.find(')')
	14	parents = statement[parents_start:parents_end].strip()		14	parents = statement[parents_start:parents_end].strip()
	15	parents_list = [parent.strip() for parent in parents.split('		15	parents_list = [parent.strip() for parent in parents.split('
	>	,')] if parents else []		>	,')] if parents else []
	16	else:		16	else:
	17	parents_list = []		17	parents_list = []
	18	result[class_name] = parents_list		18	result[class_name] = parents_list
	19	return result		19	return result
	20			20
	21	def validate_hierarchy(classes):		21	def validate_hierarchy(classes):
	22			22
	23	def resolve_mro(class_name, resolved, unresolved):		23	def resolve_mro(class_name, resolved, unresolved):
	24	if class_name in resolved:		24	if class_name in resolved:
	25	return resolved[class_name]		25	return resolved[class_name]
	26	if class_name in unresolved:		26	if class_name in unresolved:
	27	raise ValueError('Cyclic dependency detected')		27	raise ValueError('Cyclic dependency detected')
	28	unresolved.add(class_name)		28	unresolved.add(class_name)
	29	bases = classes.get(class_name, [])		29	bases = classes.get(class_name, [])
	30	mro = [class_name] + combine_mros([resolve_mro(base, resolved, u		30	mro = [class_name] + combine_mros([resolve_mro(base, resolved, u
	>	nresolved) for base in bases] + [bases])		>	nresolved) for base in bases] + [bases])
	31	resolved[class_name] = mro		31	resolved[class_name] = mro
	32	unresolved.remove(class_name)		32	unresolved.remove(class_name)
	33	return mro		33	return mro
	34			34
	35	def combine_mros(sequences):		35	def combine_mros(sequences):
	36	result = []		36	result = []
	37	while any(sequences):		37	while any(sequences):
	38	for seq in sequences:		38	for seq in sequences:
	39	if not seq:		39	if not seq:
	40	continue		40	continue
	41	candidate = seq[0]		41	candidate = seq[0]
	42	if all((candidate not in s[1:] for s in sequences)):		42	if all((candidate not in s[1:] for s in sequences)):
	43	result.append(candidate)		43	result.append(candidate)
	44	for s in sequences:		44	for s in sequences:
	45	if s and s[0] == candidate:		45	if s and s[0] == candidate:
	46	s.pop(0)		46	s.pop(0)
	47	break		47	break
	48	else:		48	else:
	49	raise ValueError('Invalid MRO')		49	raise ValueError('Invalid MRO')
	50	return result		50	return result
	51	resolved = {}		51	resolved = {}
	52	for class_name in classes:		52	for class_name in classes:
	53	resolve_mro(class_name, resolved, set())		53	resolve_mro(class_name, resolved, set())
	54	return True		54	return True
	55	input_code = ''		55	input_code = ''
	56	while (line := input().strip()):		56	while (line := input().strip()):
	57	input_code += line + '\n'		57	input_code += line + '\n'
	58	try:		58	try:
	59	class_structure = extract_classes(input_code)		59	class_structure = extract_classes(input_code)
	60	print('Yes' if validate_hierarchy(class_structure) else 'No')		60	print('Yes' if validate_hierarchy(class_structure) else 'No')
	61	except ValueError:		61	except ValueError:
	62	print('No')		62	print('No')

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