leetcode_171번 - Excel Sheet Column Number(단순 수학 문제)

1164 단어 LeetCode

Excel Sheet Column Number

 
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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 

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

public:

    int titleToNumber(string s) {

        	int len=s.size();

	int last_reault=0;

	int j=0;

	for(int i=len-1;i>=0;i--)

	{

		last_reault+=(s[i]-64)*pow(26.0,j);

		j++;

	}

	return last_reault;

    }

};


  

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