My python solution, easy to understand

  • -5

    I am not using one line solution, which is hard at understand the recursion part.
    this solution is easy to understand, very simple recursion.

    s = ''
        s = chr(((num-1)%26)+ord('A'))+s
        num = (num-1)/26
    return s

  • 0

    You need to reverse s and use // for floor div. otherwise, very good

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