leetcode 168

Posted 2021-07-04 东东就是我

class Solution(object):
    def convertToTitle(self, columnNumber):
        """
        :type columnNumber: int
        :rtype: str
        """
        import string
        res = ""
        while columnNumber:
            columnNumber-=1
            s2=columnNumber%26
            res=string.ascii_uppercase[s2]+res
            columnNumber//=26
        return res