Update solution 013 [python2] - 80ms

Author: zhanary

solution/013.Roman to Integer/Solution2.py

@@ -1,3 +1,4 @@
+# 80ms with python2
 class Solution(object):
     def romanToInt(self, s):
         dict = {'M':1000, 'D':500, 'C':100, 'L':50, 'X':10, 'V':5, 'I':1}   #对应关系存在一个字典里