Best Time to Buy and Sell Stock 【最佳买卖股票的时间】【容易】

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一、题目

英文:Best Time to Buy and Sell Stock

中文:最佳买卖股票的时间

二、内容要求

英文:

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

If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design an algorithm to find the maximum profit.

中文:给一个数组prices[],prices[i]代表股票在第i天的售价,求出只做一次交易(一次买入和卖出)能得到的最大收益。

三、示例

示例一
Input: [7, 1, 5, 3, 6, 4]Output: 5max. difference = 6-1 = 5 (not 7-1 = 6, as selling price needs to be larger than buying price)
示例二
Input: [7, 6, 4, 3, 1]Output: 0In this case, no transaction is done, i.e. max profit = 0.

四、代码

1.java代码

1.2另一种易理解形式



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