一组数据差值之和最大

#include <bits/stdc++.h>
using namespace std;
class Solution{
    std::vector<std::string> split(std::string &str, char ch){
        std::vector<std::string> ans;
        str += ch;
        int i = 0;
        for (int j = 0; j < str.size(); ++j) {
            if(str[j] == ch){
                ans.push_back(str.substr(i, j - i));
                i = j + 1;
            }
        }
        return ans;
    }
public:
    int process(std::string str){
        std::vector<std::string> tmp = split(str, ' ');
        std::vector<int> prices;
　　　　　//string容器转int容器保存
        for (int i = 0; i < tmp.size(); i++)
        {
            prices.push_back(atoi(tmp[i].c_str()));
        }
    　　int min_ = prices[0], max_ = prices[0], answer = 0;
    　　for (int i = 1; i < prices.size(); ++i) {//连续降序找到最小，然后连续升序找到最大。--循环
        if (prices[i] < max_) {
            answer += max_ - min_;
            max_ = min_ = prices[i];
        } 
　　　　 else max_ = prices[i];
    　　}
    　　answer += max_ - min_;
    　　return answer;
    }
};

int main()
{
  // please write your code here
  std::string str, str1;
  getline(std::cin, str1);
  getline(std::cin, str);
  Solution a;
  std::cout << a.process(str);
  return 0;
}