1 class Solution {
 2 public:
 3     int maxProfit(vector<int> &prices) {
 4         // Start typing your C/C++ solution below
 5         // DO NOT write int main() function
 6         int result=0;
 7         if(prices.size()==0||prices.size()==1) return 0;
 8         for(int i=0;i<prices.size()-1;i++)
 9         {
10             int profit=prices[i+1]-prices[i];
11             if(profit>0)
12             {
13                 result+=profit;
14             }
15         }
16         return result;
17     }
18 };