Q.23

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

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

int main()
{
    string s;
    cin >> s;
    if (isPalindrome(s))
        cout << "Yes";
    else
        cout << "No";
    return 0;
}