(Leet Code c++)Length of Last Word

58. Length of Last Word

 

Given a string s consists of some words separated by spaces, return the length of the last word in the string. If the last word does not exist, return 0.

A word is a maximal substring consisting of non-space characters only.

 

Example 1:

Input: s = "Hello World" Output: 5

Example 2:

Input: s = " " Output: 0

 

Constraints:

• 1 <= s.length <= 104
• s consists of only English letters and spaces ' '.

 

class Solution {
public:
    int lengthOfLastWord(string s) {
        string token;
        stringstream ss(s);
        vector<string> str;
        
        while(ss >> token){
            str.push_back(token);
        }
        
        if(str.empty()){
            return 0;
        }
        else{
            return str.back().size();
        }
    }
};