Description

Related to question Excel Sheet Column Title

Given a column title as appear in an Excel sheet, return its corresponding column number.

Example

A -> 1 B -> 2 C -> 3 … Z -> 26 AA -> 27 AB -> 28

Code

class Solution(object): def titleToNumber(self, s): """ :type s: str :rtype: int """ return sum((ord(i) - 64) * pow(26, p) for p,i in enumerate(s[::-1]))