August - Day 10 - Excel Sheet Column Number

Solution.py

# https://leetcode.com/explore/featured/card/august-leetcoding-challenge/550/week-2-august-8th-august-14th/3419/

class Solution:
  def titleToNumber(self, s: str) -> int:
    res = 0
    power = 0
    for i in reversed(range(len(s))):
      res += int(ord(s[i]) - ord('A') + 1) * (26**power) 
      power += 1
    return res