LeetCode练题——122. Best Time to Buy and Sell Stock II

1、题目

给定一个数组,它的第 i 个元素是一支给定股票第 i 天的价格。

设计一个算法来计算你所能获取的最大利润。你可以尽可能地完成更多的交易(多次买卖一支股票)。

注意:你不能同时参与多笔交易(你必须在再次购买前出售掉之前的股票)。

示例 1:

输入: [7,1,5,3,6,4]
输出: 7
解释: 在第 2 天(股票价格 = 1)的时候买入,在第 3 天(股票价格 = 5)的时候卖出, 这笔交易所能获得利润 = 5-1 = 4 。
  随后,在第 4 天(股票价格 = 3)的时候买入,在第 5 天(股票价格 = 6)的时候卖出, 这笔交易所能获得利润 = 6-3 = 3 。
示例 2:

输入: [1,2,3,4,5]
输出: 4
解释: 在第 1 天(股票价格 = 1)的时候买入,在第 5 天 (股票价格 = 5)的时候卖出, 这笔交易所能获得利润 = 5-1 = 4 。
  注意你不能在第 1 天和第 2 天接连购买股票,之后再将它们卖出。
  因为这样属于同时参与了多笔交易,你必须在再次购买前出售掉之前的股票。
示例 3:

输入: [7,6,4,3,1]
输出: 0
解释: 在这种情况下, 没有交易完成, 所以最大利润为 0。

来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-ii
著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。

2、我的解答

 1 # -*- coding: utf-8 -*-
 2 # @Time    : 2020/3/3 11:22
 3 # @Author  : SmartCat0929
 4 # @Email   : [email protected]
 5 # @Link    : https://github.com/SmartCat0929
 6 # @Site    :
 7 # @File    : 122. Best Time to Buy and Sell Stock II.py
 8
 9
10 from typing import List
11
12
13 class Solution:
14     def maxProfit(self, prices: List[int]) -> int:
15         lens = len(prices)
16         if lens == 0 or lens == 1:
17             return 0
18         profit = 0
19         for i in range(1, lens):
20             temp = prices[i] - prices[i - 1]
21             if temp > 0:
22                 profit = profit + temp
23         return profit
24
25
26 print(Solution().maxProfit([7, 1, 5, 3, 6, 4]))

原文地址:https://www.cnblogs.com/Smart-Cat/p/12401468.html

时间: 2024-10-06 08:19:10

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