Leetcode 171. Excel Sheet Column Number

文章作者：Tyan 博客：noahsnail.com | CSDN | 简书

1. Description

2. Solution

• Version 1

代码语言：javascript复制

class Solution:
    def titleToNumber(self, s):
        result = 0
        mapping = {chr(64 i): i for i in range(1, 27)}
        s = list(s)
        s.reverse()

        for index, ch in enumerate(s):
            result = result   mapping[ch] * math.pow(26, index)
        return int(result)

• Version 2

代码语言：javascript复制

class Solution:
    def titleToNumber(self, s):
        result = 0
        for ch in s:
            result = result * 26   ord(ch) - 64
        return result

Reference

1. https://leetcode.com/problems/excel-sheet-column-number/

sdn com version 博客

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