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Leetcode#171 Excel Sheet Column Number

原题地址

 

注意从1开始索引,所以记得+1

 

代码:

 1 int titleToNumber(string s) { 2         int res = 0; 3          4         for (int i = 0; i < s.length(); i++) { 5             res *= 26; 6             res += s[i] - A + 1; 7         } 8          9         return res;10 }

 

Leetcode#171 Excel Sheet Column Number