Deque 操作
雙端佇列是一個雙端佇列。
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:平均情況(假設引數是隨機生成的)
附加:O(1)
附錄:O(1)
複製:O(n)
延伸:O(k)
Extendleft:O(k)
流行:O(1)
Popleft:O(1)
刪除:O(n)
旋轉:O(k)