find last word length.txt

Given a string s consisting of some words separated by some number of spaces, return the length of the last word in the string.

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

 

Example 1:

Input: s = "Hello World"
Output: 5
Explanation: The last word is "World" with length 5.
Example 2:

Input: s = "   fly me   to   the moon  "
Output: 4
Explanation: The last word is "moon" with length 4.
Example 3:

Input: s = "luffy is still joyboy"
Output: 6
Explanation: The last word is "joyboy" with length 6.
 




solution

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



 int lengthOfLastWord(string s) {
      int len = 0;
      for (auto it = s.crbegin(); it != s.crend(); ++it) {
        if (*it != ' ') {
          ++len;
        } else if (len > 0) {
          break;
        }
      }
      return len;
    }