Excel Sheet | Part - 1
Medium Accuracy: 47.89% Submissions: 11380 Points: 4

Given a positive integer N, return its corresponding column title as it would appear in an Excel sheet.
For N =1 we have column A, for 27 we have AA and so on.

Note: The alphabets are all in uppercase.

Example 1:

Input:
N = 51
Output: AY


Complete the function ExcelColumn() which takes N as input and returns output string.

Expected Time Complexity: O(Log(N))
Expected Auxiliary Space: O(Log(N))

Constraints:
1 ≤ N ≤ 107

We are replacing the old Disqus forum with the new Discussions section given below.