【LeetCode】171. Excel Sheet Column Number

LeetCode-171

Links:https://leetcode.com/problems/excel-sheet-column-number/

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 -&gt; 1
    B -&gt; 2
    C -&gt; 3
    ...
    Z -&gt; 26
    AA -&gt; 27
    AB -&gt; 28

A -> 1

B -> 2

C -> 3

...

Z -> 26

AA -> 27

AB -> 28

思路：A->0，26进制数。

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

class Solution {

public:

int titleToNumber(string s) {

int count = 0;

for(int i=0;i<s.size();i++)

{

count = count*26+s[i]-'A'+1;

}

return count;

}

};

【LeetCode】171. Excel Sheet Column Number

Tagged on: LeetCode