Big O week 3 day 5 p2

#include <bits/stdc++.h>
/****************************************************************

    Following is the class structure of the LinkedListNode class:

    template <typename T>
    class LinkedListNode
    {
    public:
        T data;
        LinkedListNode<T> *next;
        LinkedListNode(T data)
        {
            this->data = data;
            this->next = NULL;
        }
    };

*****************************************************************/

bool isPalindrome(LinkedListNode<int> *head) {
    LinkedListNode<int>* tmp = head;
    vector<int> v;
    while(tmp){
        v.push_back(tmp->data);
        tmp=tmp->next;
    }
    vector<int> w=v;
    reverse(w.begin(),w.end());
    return v == w;
}