leetcode oj java Excel Sheet Column Title

问题描述：

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 

思路： 10进制转为26进制，但不是从0开始，因此每次都要-1

<span style="font-size:18px;">public class Solution {    public String convertToTitle(int n) {        String re = "";while(n>0){re = (char)((n-1)%26+'A') + re;n = (n-1)/26;}return re;    }}</span>