Best Time to Buy and Sell Stock, Leetcode 解题笔记

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.

逻辑题,维护一个lowest price和一个max profit,如果当前价格低于lowest price,更新lowest price。如果当前价格-lowest price大于max profit,更新max profit。

public class Solution {
    public int maxProfit(int[] prices) {
        int minV = Integer.MAX_VALUE;
        int maxP = 0;
        for(int i = 0; i < prices.length; i++){
            if(prices[i] < minV){
                minV = prices[i];
            if(prices[i] - minV > maxP){
                maxP = prices[i] - minV;
        return maxP;

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