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Excel Sheet | Part - 1
Medium Accuracy: 26.57% Submissions: 5340 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

Your Task:
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

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Excel Sheet | Part - 1

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