Update alien-dictionary.py

kamyu104 · kamyu104 · commit 6bc435a0fcc8 · 2015-08-26T01:08:06.000+08:00
diff --git a/Python/alien-dictionary.py b/Python/alien-dictionary.py
@@ -8,11 +8,10 @@ def alienOrder(self, words):
         :type words: List[str]
         :rtype: str
         """
-        # Find ancestors of each node by BFS
         result, zero_in_degree_queue, in_degree, out_degree = [], collections.deque(), {}, {}
         nodes = sets.Set()
-        for i in xrange(len(words)):
-            for c in words[i]:
+        for word in words:
+            for c in word:
                 nodes.add(c)
         
         for i in xrange(1, len(words)):
