import java.util.*;

class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong()*10;
	 	long m = sc.nextLong();
		if((n+m)%2 == 0){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
		sc.close();
	}
}