/**
 * 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整型一维数组 
 * @param pricesLen int prices数组长度
 * @return int整型
 */
int maxProfit(int* prices, int pricesLen ) {
    // write code here
    int max = 0;
    int profit = 0;
    int a = prices[0];
    for (int i = 1; i < pricesLen; i++)
    {
        profit = prices[i] - a;
        if (profit > max)
        {
            max = profit;
        }
        if (profit < 0)
        {
            a = prices[i];
        }
    }
    return max;
}