Surelly not the best solution, but it was fun public static void main(String[] args) {

    Scanner sc=new Scanner(System.in);
    String A=sc.next();
    char[] chars = A.toCharArray();
    int correctLength = chars.length % 2 == 0 ? chars.length/2 : chars.length/2 + 1;
    char[] reverseChars = new char[correctLength];

    /* Enter your code here. Print output to STDOUT. */
    for(int i = 0; i < correctLength; i++) {
        reverseChars[i] = chars[chars.length - i - 1];
    }
    if(new String(reverseChars).equals(A.substring(0, correctLength))){
        System.out.println("Yes");
    } else {
        System.out.println("No");
    }
}