LeetCode Excel Sheet Column Number

Excel Sheet Column Number Total Accepted: 19547 Total Submissions: 52851 My Submissions Question Solution
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 -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28 

很简单：AB==1*26+2

class Solution {
public:
    int titleToNumber(string s) {
        int sum=0;
        for(string::size_type i=0;i<s.size();++i)
        {
            sum=sum*26+s[i]-‘A‘+1;
        }
        return sum;
    }
};

Submission Details
1000 / 1000 test cases passed.
Status: Accepted
Runtime: 14 ms