只要做过之前的那个Integer To Roman, 这个就不会很难啦~ 掌握转换规律, 建个table就OK了
"""
Programmer : EOF
Date : 2015.04.11
File : rti.py
E-mail : [email protected]
"""
class Solution:
# @return an integer
def romanToInt(self, s):
base = {"I":1, "IV":4, "V":5, "IX":9 , \
"X":10, "XL":40, "L":50, "XC":90, \
"C":100, "CD":400, "D":500, "CM":900,\
"M":1000}
ret_num = 0
length = len(s)
i = 0
while i < length :
if s[i:i+2] in base:
ret_num += base[s[ i:i+2] ]
i += 2
elif s[i] in base:
ret_num += base[s[i]]
i += 1
return ret_num
#----------- just for testing -----------
s = Solution()
print s.romanToInt("MCXLXC")
