import java.util.*;


public class Solution {
    /**
     * 
     * @param prices int整型一维数组 
     * @return int整型
     */
    public int maxProfit (int[] prices) {
        int min = 10000;
        int res = 0;
        for (int i = 0; i < prices.length; i++) {
            res = Math.max(prices[i] - min, res);
            min = Math.min(min, prices[i]);
        }

        return res;
    }
}