Leetcode 171. Excel Sheet Column Number

文章作者:Tyan
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1. Description

Excel Sheet Column Number

2. Solution

  • Version 1
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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
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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/
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