Excel Sheet Column Title
Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: 1 -> A 2 -> B 3 -> C ... 26 -> Z 27 -> AA 28 -> AB ... Example 1 Input: 1 Output: "A" Example 2 Input: 28 Output: "AB" Example 3 Input: 701 Output: "ZY" Solution class Solution: def convertToTitle(self, n): """ :type n: int :rtype: str """ digit = 1 res = "" while n > 0: # Because we start from A.