# -*- coding: utf-8 -*-

def roman(num):
    ints = (1000, 900,  500, 400, 100,  90, 50,  40, 10,  9,   5,  4,   1)
    nums = ('M',  'CM', 'D', 'CD','C', 'XC','L','XL','X','IX','V','IV','I')
    res = ""
    for i, n in zip(ints, nums):
        res += n * (num // i)
        num %= i
    return res