Problem:
Score : 100 points

Problem Statement

You are given integers A and B, each between 1 and 3 (inclusive).

Determine if there is an integer C between 1 and 3 (inclusive) such that A \times B \times C is an odd number.

Constraints

All values in input are integers.

1 \leq A, B \leq 3

Input

Input is given from Standard Input in the following format:

A B

Output

If there is an integer C between 1 and 3 that satisfies the condition, print Yes; otherwise, print No.

Sample Input 1

3 1

Sample Output 1

Yes

Let C = 3. Then, A \times B \times C = 3 \times 1 \times 3 = 9, which is an odd number.

Sample Input 2

1 2

Sample Output 2

No

Sample Input 3

2 2

Sample Output 3

No

Solution in Common Lisp (SBCL 1.1.14) (judge verdict: Accepted)

(defun calc (a b &optional (c 1) (ans "No"))
  (let ((r (* c (* a b))))
    (cond ((> c 3)
           ans)
          ((oddp r)
           "Yes")
          (t (calc a b (incf c))))))

(defun main ()
  (let ((a (read)))
    (let ((b (read)))
      (format t "~a~%" (calc a b)))))

(main)