Given a positive integer, return its corresponding column title as appear in an Excel sheet. 一个数字对26取余得到[0, 25],但是我们需要的是[1,26 ...
# Given an integer columnNumber, return its corresponding column title as it appears in an Excel sheet. # For example: A -> 1, B -> 2, C -> 3 ... Z -> 26, AA -> 27, AB -> 28 ... # Generate characters ...
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