yong-liang-ge-zhan-shi-xian-dui-lie-lcof.py

class CQueue(object):
	def __init__(self):
		self.s1 = []
		self.s2 = []

	def appendTail(self, value):
		"""
		:type value: int
		:rtype: None
		"""
		self.s1.append(value)

	def deleteHead(self):
		"""
		:rtype: int
		"""
		if not self.s2:
			while self.s1:
				self.s2.append(self.s1.pop())
		if not self.s2:
			return -1
		return self.s2.pop()

# Your CQueue object will be instantiated and called as such:
# obj = CQueue()
# obj.appendTail(value)
# param_2 = obj.deleteHead()