Excel column number
Given a spreadsheet column title (A, B, ..., Z, AA, AB, ...), return its 1-based column number.
Implement
title_to_number(s: str) → intExamples
in
["A"]out1What a strong answer looks like
State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.
0:00 of about 15 min
solution.py
InputExpectedGot
["A"]1not run yetsample