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();
}
}