描述
Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
您在真实的面试中是否遇到过这个题? 是
样例
A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
无难度题目:
class Solution {
public:
/**
* @param s: a string
* @return: return a integer
*/
int titleToNumber(string &s) {
// write your code here
int sum=0;
for(int i=0;i<s.length();i++){
sum=sum*26+s[i]-'A'+1;
}
return sum;
}
};