和为s的连续队列

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import queue
class MaxQueue:

    def __init__(self):
        self.deque = queue.deque()

    def max_value(self) -> int:
        return max(self.deque) if self.deque else -1

    def push_back(self, value: int) -> None:
        self.deque.append(value)

    def pop_front(self) -> int:
        return self.deque.popleft() if self.deque else -1


# Your MaxQueue object will be instantiated and called as such:
# obj = MaxQueue()
# param_1 = obj.max_value()
# obj.push_back(value)
# param_3 = obj.pop_front()