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 

Tips:

%26就好了

Code：

public class Solution { public String convertToTitle(int n) { StringBuilder result = new StringBuilder();

    while(n>0){
        n--;
        result.insert(0, (char)('A' + n % 26));
        n /= 26;
    }

    return result.toString();
}

}