import java.util.Scanner;
public class JavaThieves877 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int c1 = Integer.parseInt(scanner.next());
        int c2 = Integer.parseInt(scanner.next());

        if (c1 % 2 == 0 || c2 % 2 != 0) {
            System.out.print("Yes");
        } else if (c1 % 2 != 0 || c2 % 2 == 0) {
            System.out.print("No");
        }
    }
}