Best Time to Buy and Sell Stock 2

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https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/

class Solution {
public:
    int maxProfit(vector<int>& prices) {
        int n=prices.size();
        int sum=0;//定义利润
        for(int i=1;i<n;i++)
        {
            if(prices[i]-prices[i-1]>0)
                sum+=prices[i]-prices[i-1];
        }
        return sum;
    }
};