Deque 操作
双端队列是一个双端队列。
class Deque:
def __init__(self):
self.items = []
def isEmpty(self):
return self.items == []
def addFront(self, item):
self.items.append(item)
def addRear(self, item):
self.items.insert(0,item)
def removeFront(self):
return self.items.pop()
def removeRear(self):
return self.items.pop(0)
def size(self):
return len(self.items)
操作:平均情况(假设参数是随机生成的)
附加:O(1)
附录:O(1)
复制:O(n)
延伸:O(k)
Extendleft:O(k)
流行:O(1)
Popleft:O(1)
删除:O(n)
旋转:O(k)