Leetcode: Excel Sheet Column Number
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Question
Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
A -> 1B -> 2C -> 3...Z -> 26AA -> 27AB -> 28
Credits:
Special thanks to @ts for adding this problem and creating all test cases.
Analysis
it is an easy math problem.
Solution
class Solution: # @param {string} s # @return {integer} def titleToNumber(self, s): res = 0 if s=="": return res s = list(s) n = len(s) for i in range(len(s)): res += (ord(s[i])-64) * (26**(n-1-i)) return res
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