168. Excel Sheet Column Title

Link

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

    public static String convertToTitle(int n) {
        int modresult = 0;
        StringBuilder sb = new StringBuilder();
        while(n != 0){
            n--;
            modresult = n%26;
            sb.append((char)(modresult + 'A'));
            n = n/26;
        }
        sb.reverse();
        return sb.toString();
    }