Excel Sheet Column Number 分类： Leetcode 2015-01-15 11:15 71人阅读 评论(0) 收藏

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 

水题

class Solution {
public:
    int titleToNumber(string s) {
        int len=s.length();
        int i,j;
        int sum=0;
        for(i=0;i<len;i++)
        {
            sum*=26;
            sum+=s[i]-'A'+1;
        }
        return sum;
        
    }
};

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