LCOJ - 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 

 

// 进制转换class Solution {public:string convertToTitle(int n) {string res = "";while (n) {res += 'A' + (--n % 26);n /= 26;}reverse(res.begin(), res.end());return res;}};