Medium Accuracy: 47.46%
Submissions: 2533 Points: 4
Given a positive integer, return its corresponding column title as appear in an Excel sheet.
Excel columns has a pattern like A, B, C, … ,Z, AA, AB, AC,…. ,AZ, BA, BB, … ZZ, AAA, AAB ….. etc. In other words, column 1 is named as “A”, column 2 as “B”, column 27 as “AA” and so on.
N = 28
Explanation: 1 to 26 are A to Z.
Then, 27 is AA and 28 = AB.
N = 13
Explanation: M is the 13th character of
You don't need to read input or print anything. Your task is to complete the function colName() which takes the column number N as input and returns the column name represented as a string.
Expected Time Complexity: O(LogN). Expected Auxiliary Space: O(1).