answer.py

#!/usr/bin/env python3

#-------------------------------------------------------------------------------
class Solution:
    def convertToTitle(self, n):
        """
        :type n: int
        :rtype: str
        """
        if n == 0:
            return ""
        else:
            return self.convertToTitle((n-1)//26) + chr((n-1)%26 + ord('A'))
        
#-------------------------------------------------------------------------------