leetcode-12-整数转罗马数字

题目描述：

方法一：

class Solution:
    def intToRoman(self, num: int) -> str:
        res = "" 
        values = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1] 
        symbols = ['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I']
        i = 0
        while num>0:
            count = num//values[i]
            res += "".join([symbols[i] for _ in range(count)])
            num -= count*values[i]
            i += 1
        return res