LeetCode之Best Time to Buy and Sell Stock II

/*可以多次交易，但是只能同时持有一个股。则对于当天的股，只要在第二天卖出能够盈利，那么就买进，第二天卖出。*/class Solution {public:    int maxProfit(vector<int>& prices) {        if(prices.size() <= 1) return 0;        int res(0);        for(int i = 1; i < prices.size(); ++i){            if(prices[i] > prices[i-1]) res += prices[i] - prices[i-1];        }        return res;    }};