Reverse the words.cpp

Given an input string s, reverse the order of the words.

A word is defined as a sequence of non-space characters. The words in s will be separated by at least one space.

Return a string of the words in reverse order concatenated by a single space.

Note that s may contain leading or trailing spaces or multiple spaces between two words. The returned string should only have a single space separating the words. Do not include any extra spaces.

 

Example 1:

Input: s = "the sky is blue"
Output: "blue is sky the"
Example 2:

Input: s = "  hello world  "
Output: "world hello"
Explanation: Your reversed string should not contain leading or trailing spaces.
Example 3:

Input: s = "a good   example"
Output: "example good a"
Explanation: You need to reduce multiple spaces between two words to a single space in the reversed string.
  
  code*****
  class Solution {
public:
      string reverseWords(string s) {
        
        stringstream ss(s); //STRINGSREAM IS FUNCTION  USED TO COUNT THE WORKDS OF GIVEN STRING
        string line; 
        vector<string> v; 
        while(ss>>line){
            v.push_back(line);
        }
        
        string ans; 
        for(int i = v.size()-1;i>=0;i--){
            ans+= v[i] + " ";
        }
        
        ans.pop_back(); 
        return ans; 
    }
};