Easy
Quiz
#171 Excel Sheet Column Number
APPROACH
Given a string columnTitle that represents the column title as appears in an Excel sheet, return its corresponding column number.
For example:
A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
...
Example 1:
A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
...
Example 2:
Input: columnTitle = "A"
Output: 1
Example 3:
Input: columnTitle = "AB"
Output: 28
Example 4:
Input: columnTitle = "ZY"
Output: 701
1 of 4
What is the optimal approach for this problem?