class Solution {public:    string reverseWords(string s) {        int n = s.length();        string ans = "";        int i =0; 
        while(i<n){            string temp ="";            while(s[i] == ' ' && i<n){                i++;            }            while(s[i]!= ' ' && i<n){                temp = temp + s[i];                i++;            }            if(temp.size()>0){                if(ans.size() == 0){                    ans = temp;                }                else{                    ans = temp + " " + ans;                }            }        }        return ans;    }};