leetcode--171 Excel Sheet Column number

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Excel Sheet Column NumberTotal Accepted: 8076 Total Submissions: 20724 My SubmissionsQuestionSolution

Related to question Excel Sheet Column Title

Given a column title as appear in an Excel sheet, and return its corresponding column number.

For example:

    1,    B, 2    C-3    ...    27 AA, Z    


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

is equivalent to 26 binary

e.g. aa=1*26+1;  ab=1*26+2; ba=2*26+1=53;

Class Solution {public:    int Titletonumber (string s) {        int n=s.length (), i,s1= ' A ';        for (i=0;i<n;i++)        {            s1= (s1-' a ') *26+s[i]-' a ' +1;            s1=s1+ ' A ';        }        Return s1-' A ';    };  

leetcode--171 Excel Sheet Column number

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