# Excel Column Title InterviewBit Solution

**Problem: **__Excel Column Title__

**Problem Description: **
Given a positive integer **A**, return its corresponding column title as appear in an Excel sheet.
**Problem Constraints**

`1 <= A <= 1000000000`

**Input Format**

`First and only argument is integer A.`

**Output Format**

`Return a string, the answer to the problem.`

**Example Input**

**Input ****1****:**
A = 1
**Input ****2****:**
A = 28

**Example Output**

**Output ****1****:**
"A"
**Output ****2****:**
"AB"

**Example Explanation**

**Explanation ****1****:**
1 -> A
**Explanation ****2****:**
1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB

## Approach

This question is just about the base conversion. Think about what would you have done if instead of excel (base-26) you were given a binary.

## Time & Space Complexity:

Time Complexity: O(logN) -> base 26

Space Complexity: O(1)

**Solution:**

Code in C++