#22335: [python]請問這樣哪裡有問題?

#### zz5120937@gmail.com (meteor(梁欣宇))

School : 義守大學
ID : 125986
2021-03-28 19:11:54
a013. 羅馬數字 -- | From: [123.110.176.148] | Post Date : 2020-08-25 16:31

while True:    try:        str_1, str_2 = input().split(' ')    except:        break;    r2i = {'I': 1, 'V': 5, 'X': 10, 'L': 50,'C': 100, 'D': 500, 'M': 1000}    list1 = [r2i[i] for i in str_1]    list2 = [r2i[i] for i in str_2]    for c in range(len(list1) - 1):        if list1[c] < list1[c+1]:            list1[c] *= -1    for x in range(len(list2) - 1):        if list2[x] < list2[x+1]:            list2[x] *= -1    num1 = sum(list1)    num2 = sum(list2)    if num1 > num2:        num = num1 - num2    else:        num = num2 - num1    i2r = {1000: 'M', 900: 'CM', 500: 'D', 400: 'CD', 100: 'C', 90: 'XC',           50: 'L', 40: 'XL', 10: 'X', 9: 'IX', 5: 'V', 4: 'IV', 1: 'I'}    if num == 0:        print('ZERO')    r_str = ''    while num > 0:        for key in i2r:            if num >= key:                r_str += i2r[key]                num -= key    print(r_str)

#23702: Re:[python]請問這樣哪裡有問題?

#### tomtom5464@gmail.com (黑貓)

School : 義守大學
ID : 140111
    while num > 0:
num -= key你的這邊不會重複扣