SemClass/VoMaKu			SemClass/ziptitap
f	1	class Lock:	f	1	class Lock:
n	2	const_ = None	n	2	cn = None
	3			3
	4	def __new__(item):		4	def __new__(item):
n	5	if item.const_ is None:	n	5	if item.cn is None:
	6	item.const_ = super(Lock, item).__new__(item)		6	item.cn = super(Lock, item).__new__(item)
	7	item.dict_semofor = {}		7	item.dict_semofor = {}
n	8	return item.const_	n	8	return item.cn
	9			9
	10	@staticmethod		10	@staticmethod
	11	def locked(item):		11	def locked(item):
n	12	item.lock = Sem()	n	12	item.lock = Semaphore()
	13	item.counter = None		13	item.count = None
	14			14
n	15	def delete_obj(self):	n	15	def dlt_obj(self):
	16	del self.lock		16	del self.lock
	17	try:		17	try:
	18	super(type(self), self).__del__		18	super(type(self), self).__del__
	19	except AttributeError:		19	except AttributeError:
	20	pass		20	pass
	21	else:		21	else:
	22	super(type(self), self).__del__()		22	super(type(self), self).__del__()
n	23	item.__del__ = delete_obj	n	23	item.__del__ = dlt_obj
	24	return item		24	return item
	25			25
n	26	class Sem:	n	26	class Semaphore:
	27			27
	28	def __init__(self):		28	def __init__(self):
	29	self.resources = Lock()		29	self.resources = Lock()
	30			30
n	31	def __get__(self, const_, owner):	n	31	def __get__(self, cn, owner):
	32	locked = self.resources.dict_semofor.get(const_.counter)		32	locked = self.resources.dict_semofor.get(cn.count)
	33	if not locked:		33	if not locked:
n	34	self.resources.dict_semofor[const_.counter] = id(const_)	n	34	self.resources.dict_semofor[cn.count] = id(cn)
	35	return const_.counter		35	return cn.count
	36	elif locked == id(const_):		36	elif locked == id(cn):
	37	return const_.counter		37	return cn.count
	38	else:		38	else:
	39	return None		39	return None
	40			40
n	41	def __delete__(self, const_):	n	41	def __delete__(self, cn):
	42	if self.resources.dict_semofor.get(const_.counter) == id(const_):		42	if self.resources.dict_semofor.get(cn.count) == id(cn):
	43	self.resources.dict_semofor[const_.counter] = None		43	self.resources.dict_semofor[cn.count] = None
	44	const_._lock = None		44	cn._lock = None
	45			45
t	46	def __set__(self, const_, elem):	t	46	def __set__(self, cn, v):
	47	if self.resources.dict_semofor.get(const_.counter) == id(const_):		47	if self.resources.dict_semofor.get(cn.count) == id(cn):
	48	self.resources.dict_semofor[const_.counter] = None		48	self.resources.dict_semofor[cn.count] = None
	49	const_.counter = elem		49	cn.count = v
	50	import sys		50	import sys
	51	exec(sys.stdin.read(), globals())		51	exec(sys.stdin.read(), globals())

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