LeetCode: 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

class Solution {
public:
string convertToTitle(int n) {
string result = "";
while(n > 0)
{
char cur = (n-1) % 26 + 65;
result.insert(0, 1, cur);
n = (n-1) / 26;
}
return result;
}
};