Problem title
Difficulty
Avg time to solve

Clone a Linked List with random pointers
Easy
--
Most Cost Efficient Car
Easy
10 mins
All Root to Leaf Paths In Binary Tree.
Moderate
25 mins
First unique character in a string
Moderate
15 mins
Partition String
Moderate
25 mins
AVL Tree: Insert
Easy
15 mins
Excel Equivalent of a Decimal Number
Moderate
25 mins
Lexicographically Smallest Array
Easy
15 mins
Look & Say Sequence
Easy
10 mins
Leftmost and rightmost nodes in a binary tree
Easy
20 mins

# Excel Equivalent of a Decimal Number

Difficulty: MEDIUM
Contributed By
Avg. time to solve
25 min
Success Rate
50%

Problem Statement

#### Note:

``````1. The Excel equivalent of 1 is "A", the Excel equivalent of 2 is "B" ……………, the Excel equivalent of 26 is "Z".

2. The Excel equivalent of 27,28…,52 is "AA", "AB"…."AZ" respectively.

3. The Excel Equivalent of 53,54….78 is "BA", "BB"….."BZ".

4. The pattern shown above can be used to find the excel equivalent of any positive number.

5. There is only one Excel Equivalent for a given positive number.
``````
##### Input format:
``````The first line of input contains an integer ‘T’ denoting the number of test cases.

The first and only line of each test case contains a number 'N' of which the Excel Equivalent is required to be found.
``````
##### Output format:
``````For each test case, return the Excel equivalent of a given number in a separate line.
``````
##### Note:
``````You don't need to print anything, it has already been taken care of. Just implement the given function.
``````
``````Can you solve this in logarithmic time and space complexity?
``````
##### Constraints:
``````1 <= T <= 1000
1 <= N <= 10^15

Time limit: 1sec
``````
##### Sample Input 1:
``````2
2
9
``````
##### Sample Output 1:
``````B
I
``````
##### Explanation of Sample Output 1:
``````In test case 1, the Excel Equivalent of 2 is B.

In test case 2, the Excel Equivalent of 9 is I.
``````
##### Sample Input 2:
``````2
27
31
``````
##### Sample Output 2:
``````AA
AE
``````
##### Explanation of Sample Output 2:
``````In test case 1, the Excel equivalent of 26 is Z and therefore the Excel equivalent of 27 is AA.

In test case 2, the Excel equivalent of 27 is AA and therefore the Excel equivalent of 31 will be AE.
``````
Console