contest xau ki tu palindrome

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>

using namespace std;

#define pub push_back
#include<bits/stdc++.h>

bool isPalindrome (string s){
    string t= s;
    reverse ( s.begin(),s.end());
    return t== s;
}

int main() {
    string s;
    getline(cin,s);
    stringstream ss(s);
    string t;
    vector<string > v;
    map<string, int > mp;
    int count =0;
    while ( ss>> t) {
        count ++ ;
        if ( isPalindrome (t) ){
            mp[t]=count;
        }
    }

    for (auto x:mp){
        v.pub(x.first);
    }

    for (int i=0;i<v.size();i++){
        for (int j=i+1;j<v.size();j++){
            if ( v[i].size()> v[j].size()){
                swap(v[i],v[j]);
            }
            else if ( v[i].size() == v[j].size()){
                if (mp[v[i]] > mp[v[j]]){
                    swap (v[i],v[j]);
                }
            }

        }
    }


    for (auto x: v){
        cout<<x<<" ";
    }
    /* Enter your codfore here. Read input from STDIN. Print output to STDOUT */
    return 0;
}