171. Excel Sheet Column Number

Posted 2020-07-03 阿怪123

public class Solution {
    public int titleToNumber(String s) {
        int len=s.length();
        int res=0;
        for(int i=0;i<len;i++)
        {
            res=res*26;
            res+=((s.charAt(i)-‘A‘)+1);
        }
        return res;
    }
}