Excel Sheet Column Title

Excel Sheet Column Title

Total Accepted: 45878 Total Submissions: 230128 Difficulty: Easy

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 res;
while(n){
int r = (n-1)%26;
res.push_back('A' + r);
n = (n-1)/26;
}
reverse(res.begin(),res.end());
return res;
}
};