Simplify code for 121.

gavinfish · gavinfish · commit 4f483fc4a45b · 2016-04-07T15:16:56.000+08:00
diff --git a/121 Best Time to Buy and Sell Stock.py b/121 Best Time to Buy and Sell Stock.py
@@ -12,15 +12,13 @@ def maxProfit(self, prices):
         """
         if len(prices) < 2:
             return 0
-        max_price = min_price = prices[0]
+        min_price = prices[0]
         max_profit = 0
         for price in prices:
-            if price > max_price:
-                max_price = price
             if price < min_price:
-                max_price = min_price = price
-            if max_price - min_price > max_profit:
-                max_profit = max_price - min_price
+                min_price = price
+            if price - min_price > max_profit:
+                max_profit = price - min_price
         return max_profit
 
 
