Excel Sheet Column Number

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 ... ### Constraints - `1 <= columnTitle.length <= 7` - `columnTitle` consists only of uppercase English letters. - `columnTitle` is in the range `["A", "FXSHRXW"]`. ### Input Format A single line containing the string `columnTitle`. ### Output Format Print the corresponding column number.