LeetCode Best Time to Buy and Sell Stock

 1 public class Solution {
 2     public int maxProfit(int[] prices) {
 3         if (prices.length<=1) {
 4             return 0;
 5         }
 6         
 7         int minPrice=prices[0];
 8         int profit=0;
 9         for (int i = 1; i < prices.length; i++) {
10             if ((prices[i]-minPrice)>profit) {
11                 profit=prices[i]-minPrice;
12             }
13             if (prices[i]<minPrice) {
14                 minPrice=prices[i];
15             }
16         }
17         
18         return profit;
19     }
20 }