answer

#include <bits/stdc++.h>
using namespace std;

string str , Str;

int main() {
    cin >> str;
    Str = "";
    
    for (int i = str.length() - 1 ; i >= 0 ; i--) {
         Str += str[i];
    }

    if (Str == str) {
        cout << "Yes" << endl;
    }else {
        cout << "No" << endl;
    }

    return 0;
}