public class ReverseString {
    // https://www.hackerrank.com/challenges/java-string-reverse/problem

    public ReverseString() {
        Scanner sc=new Scanner(System.in);
        String str = sc.next();
        int n = str.length();
        int j = n;
        
        // Time complexity -> O(n), Space complexity -> O(1)
        boolean flag = true;
        for (int i = 0; i < n / 2; i++){
            if (str.charAt(i) != str.charAt(--j)) {
                flag = false;
                break;
            }
        }
        
        System.out.println(flag ? "Yes" : "No");
    }
}