#### Determining if a Linked List is Palindromic

This problem asks whether or not a singly linked list is palindromic, meaning that the data contained within the list is the same whether read forwards or backwards. An example input is provided, along with the expected output.

#### Problem

Given a singly linked list, determine whether or not the list is palindromic.
Example input:
1 -> 2 -> 3 -> 2 -> 1
Example output:
True

#### Solution

This solution is in C++. Our A.I. can create solutions in multiple languages.
by kayakane
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <sstream>
#include <queue>
#include <deque>
#include <bitset>
#include <iterator>
#include <list>
#include <stack>
#include <map>
#include <set>
#include <functional>
#include <numeric>
#include <utility>
#include <limits>
#include <time.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>

using namespace std;

struct Node {
int data;
Node* next;
};

stack<int> s;
while (fast != NULL && fast->next != NULL) {
s.push(slow->data);
slow = slow->next; fast = fast->next->next;
}
if (fast != NULL) {
slow = slow->next;
}
while (slow != NULL) {
int top = s.top();
s.pop();
if (top != slow->data) {
return false;
}
slow = slow->next;
}
return true;
}

int main() {