查表

 # a = ['apple','orange']

# b = ['蘋果','柳橙']

# indata = input('請輸入英文水果名：')

# if indata == 'apple':

#     print('蘋果')

# if indata == 'orange':

#     print('柳橙')

# a = '0123456789ABCDEF'

# b = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]

# indata = input('請輸入16進位數字：')

# i = 0

# while a[i] != indata:

#     i+=1

# print(b[i])

# a = '0123456789ABCDEF'

# b = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]

# indata = 'E'

# f =  a.find(indata)

# print(b[f])

# f1 = a.find('F')

# print(b[f1])

# a = ['I','IV','V','IX','X']

# b = [1,4,5,9,10]

# indata = 'VII'

# n = 0

# for i in indata:

#     f = a.index(i)

#     n=n + b[f]

# print(n)

# a = ['I','IV','V','IX','X','XL','L']

# b = [1,4,5,9,10,40,50]

# indata = 'IXVIIIXXL'

# n = 0

# i = 0

# while  i <len(indata):

#     if indata[i:i+2] in a:

#         f2 = a.index(indata[i:i+2])

#         n = n +b[f2]

#         i = i +2

#     else:

#         f = a.index(indata[i])

#         n=n + b[f]

#         i = i +1

# print(n)

# a = ['I','IV','V','IX','X','XL','L']

# b = [1,4,5,9,10,40,50]

d = {'I':1,'IV':4,'V':5,'IX':9,'X':10,'XL':40,'l':50}

indata = 'IXVIIIXXL'

n = 0

i = 0

while  i <len(indata):

    if indata[i:i+2] in d:

        n = n +d[indata[i:i+2]]

        i = i +2

    else:

        n = n +d[indata[i]]

        i = i +1

print(n)