Problem:
Score : 100 points

Problem Statement

You are given a three-digit positive integer N.

Determine whether N is a palindromic number.

Here, a palindromic number is an integer that reads the same backward as forward in decimal notation.

Constraints

100≤N≤999

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a palindromic number, print Yes; otherwise, print No.

Sample Input 1

575

Sample Output 1

Yes

N=575 is also 575 when read backward, so it is a palindromic number. You should print Yes.

Sample Input 2

123

Sample Output 2

No

N=123 becomes 321 when read backward, so it is not a palindromic number. You should print No.

Sample Input 3

812

Sample Output 3

No

Solution in Common Lisp (SBCL 1.1.14) (judge verdict: Wrong Answer)

(defun te (x)
  (setq x (- x 101))
  )
(defun main ()
  (setq a (read))
 (setq i (loop for i from 1 do (te a) when (> a 99) return i)) 
 (setq a (- a (* i 101))) 
 (if (= 0 (/ a 10))
    (princ "Yes")
    (princ "No")
    )
  )
(main)