refactor 3Sum.py

yangdi · yangdi · commit c68ee0c5ca96 · 2014-12-09T20:52:39.000+08:00
diff --git a/src2/3Sum/3Sum.py b/src2/3Sum/3Sum.py
@@ -41,8 +41,7 @@ def threeSum(self, num):
     			continue
 
 			# j step backward
-    		for j in range(i + 1, numLen):
-    			j = numLen + i - j
+    		for j in reversed(range(i + 1, numLen)):
     			if j + 1 != numLen and num[j] == num[j+1]:
     				continue
 
