Update missing-number.py

kamyu104 · web-flow · commit 69fbaf6c18f1 · 2016-08-05T22:17:36.000+08:00
diff --git a/Python/missing-number.py b/Python/missing-number.py
@@ -21,6 +21,7 @@ def missingNumber(self, nums):
         return reduce(operator.xor, nums, \
                       reduce(operator.xor, xrange(len(nums) + 1)))
 
+
 class Solution2(object):
     def missingNumber(self, nums):
-        return sum([i for i in xrange(len(nums)+1)])-sum(nums)
+        return sum(xrange(len(nums)+1)) - sum(nums)
