leetcode Best Time to Buy and Sell Stock

//有个图片解释，需要编辑模式才能看。。。。

class Solution {
    public int maxProfit(int[] prices) {
        int minprice = Integer.MAX_VALUE;
        int profit = 0;
        for(int i=0;i<prices.length;i++){
            if(prices[i]<minprice){
                minprice = prices[i];
            }
            else if(prices[i]-minprice>profit){
                profit = prices[i]-minprice;
            }
        }
        return profit;
    }
}