Ea s-aCodecs:

```c++

#include <iostream>

#include <string>

#include <vector>

#include <algorithm>

using namespace std;

// Function to check if a string is a palindrome

bool isPalindrome(const string& str) {

string reversed_str = str;

reverse(reversed_str.begin(), reversed_str.end());

return str == reversed_str;

}

// Function to find the longest palindromic substring

string longestPalin