def init(args=None):
	try:
			network = args['NETWORK']
			mask = args['MASK']
	except:
		return "10.2.1.241"
	if mask<=8:
		ip=calc_num_ip(mask)
		ultima_ip=network.split(".")
		ultima_ip[1]=str(ip)
		ultima_ip[2]="255"
		ultima_ip[3]="241"
		ultima_ip = '.'.join(map(str, ultima_ip))
		return ultima_ip
	else:
		if mask<=16:
			mask=mask-8
			ip=calc_num_ip(mask)
			ultima_ip=network.split(".")
			ultima_ip[2]=str(ip)
			ultima_ip[3]="241"
			ultima_ip = '.'.join(map(str, ultima_ip))
			return ultima_ip
		else:	
			if mask<=24:
				mask=mask-16
				ip=calc_num_ip(mask)
				ip=last_ip(ip)
				ultima_ip=network.split(".")
				ultima_ip[3]=str(ip)
				ultima_ip = '.'.join(map(str, ultima_ip))
				return ultima_ip	
			#if
		#else
	#else
	#if
#def init

def last_ip(availables):
	if availables<=2:
		return 0
	if availables<=10:
		return availables-2
	if availables<=30:
		return availables-10;
	return availables-15
#def last_ip


def calc_num_ip(bits):
	ultima_ip=1
	for num in range(0,bits):
		ultima_ip=ultima_ip*2
	if ultima_ip==256:
		ultima_ip=255
	return ultima_ip	
#def calc_last_ip
#init({'NETWORK':"10.2.1.0",'MASK':24})