122 Best Time to Buy and Sell Stock II

与一非常类似。只需要改一个条件。

public class Solution {    public int maxProfit(int[] prices) {        if (prices == null || prices.length <= 1) {            return 0;        }        int max = Integer.MIN_VALUE;        int sum = 0;        for (int i = 1; i < prices.length; i++) {            int localprofit = prices[i] - prices[i - 1];            if (localprofit > 0) {                sum+=localprofit;            }            max = Math.max(max, sum);        }        return max;      }}