leetcode：Best Time to Buy and Sell Stock II 【Java】

一、问题描述

Say you have an array for which the ith element is the price of a given stock on day i.

Design an algorithm to find the maximum profit. You may complete as many transactions as you like (ie, buy one and sell one share of the stock multiple times). However, you may not engage in multiple transactions at the same time (ie, you must sell the stock before you buy again).

二、问题分析

只要后一天股价比前一天高就卖出。

三、算法代码

public class Solution {    public int maxProfit(int[] prices) {        int profit = 0;        int diff = 0;        for(int i = 1; i <= prices.length - 1; i++){            diff = prices[i] - prices[i - 1];            if(diff > 0){                profit += diff;            }        }        return profit;    }}