circular_queue.py

class MyCircularQueue:

    def __init__(self, k: int):
        self.capacity = k
        self.size = 0
        self.data = [0 for _ in range(k)]
        self.left, self.right = 0, -1


    def enQueue(self, value: int) -> bool:
        if self.isFull():   return False
        
        self.right += 1
        self.right %= self.capacity
        self.data[self.right] = value
        self.size += 1

        return True
        

    def deQueue(self) -> bool:
        if self.isEmpty():  return False

        self.left += 1
        self.left %= self.capacity
        self.size -= 1

        return True
        

    def Front(self) -> int:
        if self.isEmpty():  return -1

        return self.data[self.left]
        

    def Rear(self) -> int:
        if self.isEmpty():  return -1

        return self.data[self.right]
        

    def isEmpty(self) -> bool:
        return self.size == 0
        

    def isFull(self) -> bool:
        return self.size == self.capacity
        


# Your MyCircularQueue object will be instantiated and called as such:
# obj = MyCircularQueue(k)
# param_1 = obj.enQueue(value)
# param_2 = obj.deQueue()
# param_3 = obj.Front()
# param_4 = obj.Rear()
# param_5 = obj.isEmpty()
# param_6 = obj.isFull()