class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
     *
     * 
     * @param prices int整型vector 
     * @return int整型
     */
    int maxProfit(vector<int>& prices) {
        int ans = 0;
        for (int i = 0, minProfits = INT_MAX; i < prices.size(); i++) {
            ans = max(ans, prices[i] - minProfits);
            minProfits = min(minProfits, prices[i]);
        }
        return ans;
    }
};