Excel Sheet Column Number

Easy

Given a spreadsheet column title s (as in Excel: A, B, ..., Z, AA, AB, ...), return its corresponding column number.

Example 1

Input:  s = "A"
Output: 1

Example 2

Input:  s = "AB"
Output: 28

Example 3

Input:  s = "ZY"
Output: 701

Constraints

• 1 <= s.length <= 7
• s consists of uppercase English letters and is in the range ["A", "FXSHRXW"].