文章作者：Tyan
博客：noahsnail.com | CSDN | 简书
1. Description
Excel Sheet Column Number
2. Solution
- Version 1
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
class Solution:
def titleToNumber(self, s):
result = 0
for ch in s:
result = result * 26 + ord(ch) - 64
return result
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