class Solution(object):
def romanToInt(self, s):
res = 0
roman = dict(I=1, V=5, X=10, L=50, C=100, D=500, M=1000)
for i in range(len(s)-1):
if roman.get(s[i])>=roman.get(s[i+1]):
res += roman.get(s[i])
else:
res -= roman.get(s[i])
res += roman.get(s[len(s)-1])
return res
# 求解
s = Solution()
s.romanToInt('LVIII')
# return
58
class Solution(object):
def intToRoman(self, num):
rules = (
('M', 1000),
('CM', 900), ('D', 500), ('CD', 400), ('C', 100),
('XC', 90), ('L', 50), ('XL', 40), ('X', 10),
('IX', 9), ('V', 5), ('IV', 4), ('I', 1),
)
res = []
for roman, dec in rules:
res.extend([roman]*(num//dec))
num = num%dec
return ''.join(res)
# 求解
s = Solution()
s.intToRoman(1994)
# return
'MCMXCIV'