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  • LeetCode: Excel Sheet Column Number

    Problem:

    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 

    Credits: Special thanks to @ts for adding this problem and creating all test cases.

    Solution:

    class Solution {
    public:
        int titleToNumber(string s) {
            
            int len=s.length();
            if(len==0) return 0;
            
            int sum=0;
            for(int i=0;i<len;i++)
            {
                int num=s[i]-'A'+1;
                sum+=num*pow(26,len-1-i);
            }
            return sum;
        }
    };
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  • 原文地址:https://www.cnblogs.com/xiaoying1245970347/p/5131591.html
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