LC0484.py

class MyCircularDeque:
    def __init__(self, k: int):
        self.maxSize = k
        self.dq = deque()

    def insertFront(self, value: int) -> bool:
        if len(self.dq) < self.maxSize:
            self.dq.appendleft(value)
            return True

    def insertLast(self, value: int) -> bool:
        if len(self.dq) < self.maxSize:
            self.dq.append(value)
            return True

    def deleteFront(self) -> bool:
        if self.dq:
            self.dq.popleft()
            return True

    def deleteLast(self) -> bool:
        if self.dq:
            self.dq.pop()
            return True

    def getFront(self) -> int:
        if self.dq:
            return self.dq[0]
        return -1

    def getRear(self) -> int:
        if self.dq:
            return self.dq[-1]
        return -1

    def isEmpty(self) -> bool:
        return not self.dq

    def isFull(self) -> bool:
        return len(self.dq) == self.maxSize