卖萌的弱渣

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Excel Sheet Column Title

Given a positive integer, return its corresponding column title as appear in an Excel sheet.

For example:

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2
3
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7

1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB

Solution

(Excel-Sheet-Column-Title.py) download
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class Solution(object):
    def convertToTitle(self, n):
        """
        :type n: int
        :rtype: str
        """
        # ord('A') = 65
        ret = ""
        while n > 0:
            ret = unichr(65+(n-1)%26)+ret
            n = (n-1)/26
        return ret