168- Excel Sheet Column Title
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Question
Editorial Solution
Total Accepted: 64257 Total Submissions: 288620 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
Credits:
Special thanks to @ifanchu for adding this problem and creating all test cases.

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public class Solution {
    
    public static void main(String[] args) {
        Solution sl = new Solution();
        int[] nums = { -1, 0, 1, 26, 27, 28, 731};
        for (int n: nums) {
            System.out.print(sl.convertToTitle(n) + " \t ");
        }
        
    }
   
    
    public String convertToTitle(int n) {
        
        StringBuilder res = new StringBuilder();
        while (n > 0) {
            n--;
            res.insert(0, (char) ('A' + (n %26) ));
            n /= 26;
        }
        return res.toString();
    }
}