Merge pull request #643 from pickfire/patch-1

Remove temporary variable

Author: ericklarac

algorithms/dp/house_robber.py

@@ -15,7 +15,5 @@
 def house_robber(houses):
     last, now = 0, 0
     for house in houses:
-        tmp = now
-        now = max(last + house, now)
-        last = tmp
+        last, now = now, max(last + house, now)
     return now