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 Credits:Special thanks to @ifanchu for adding this problem and creating all test
171. Excel表列序号 给定一个Excel表格中的列名称,返回其相应的列序号. 例如, A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28 ... 示例 1: 输入: "A" 输出: 1 示例 2: 输入: "AB" 输出: 28 示例 3: 输入: "ZY" 输出: 701 class Solution { public int titleToNumbe