leetcode-58-length of last word

class Solution {
public:
    int lengthOfLastWord(string s) {
        if(s.empty())
            return 0;
        int result=0;
        for(int i=s.size()-1;i>=0;i--){
            if(s[i]!=' ')
                result++;
            else if(s[i]=' ' && result == 0)
                continue;   
            else
                return result;
        }
        return result;
    }
};