No sé de qué se trata esta pregunta. . . .
class Solution:
def romanToInt(self, s: str) -> int:
thisdict = {
'I':1,
'V':5,
'X':10,
'L':50,
'C':100,
'D':500,
'M':1000,
'IV':4,
'IX':9,
'XL':40,
'XC':90,
'CD':400,
'CM':900
}
res = 0
allposs = ['IV','IX','XL','XC','CD','CM','I','V','X','L','C','D','M']
for poss in allposs:
while poss in s:
res += thisdict[poss]
s = s.replace(poss,'',1)
return res