Leetcode no. 168

168. 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 

public class Solution {
    public String convertToTitle(int n) {
        StringBuilder sb= new StringBuilder();
        while (n>0){
            n--;
            sb.insert(0,(char) ('A'+n%26));
            n/= 26;
        }
        return sb.toString();
    }
}