python学习笔记1-SortedList的使用

题目链接

• SortedList增删改查的复杂度均为$O(logn)$
• 四种操作分别为：
  add, remove/discard/pop(弹出某个索引的元素，默认为最大值), count/index

from sortedcontainers import SortedList

class StockPrice:

    def __init__(self):
        self.price = SortedList()
        self.timePriceMap = {}
        self.maxTimestamp = 0

    def update(self, timestamp: int, price: int) -> None:
        if timestamp in self.timePriceMap:
            self.price.discard(self.timePriceMap[timestamp]) # 删除原本的时间
        self.price.add(price)
        self.timePriceMap[timestamp] = price
        self.maxTimestamp = max(self.maxTimestamp, timestamp)

    def current(self) -> int:
        return self.timePriceMap[self.maxTimestamp]

    def maximum(self) -> int:
        return self.price[-1]

    def minimum(self) -> int:
        return self.price[0]



# Your StockPrice object will be instantiated and called as such:
# obj = StockPrice()
# obj.update(timestamp,price)
# param_2 = obj.current()
# param_3 = obj.maximum()
# param_4 = obj.minimum()

参考
https://www.cnblogs.com/baiyutang7/p/16541848.html
https://zhuanlan.zhihu.com/p/545601213