[LeetCode] Best Time to Buy and Sell Stock

 1 public class Solution {
 2     public int maxProfit(int[] prices) {
 3         if (prices.length <= 1) return 0;
 4         
 5         int profit = 0;
 6         int buyPrices=prices[0];
 7         
 8         for (int i=1; i<prices.length; i++) {
 9             profit = Math.max(profit, prices[i]-buyPrices);
10             if (buyPrices > prices[i]) buyPrices = prices[i];
11         }
12         return profit;
13     }
14 }