import java.util.*;

class Main1{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt()*100;
		int m = sc.nextInt()*10;
		if((n+m)%2 == 0){
			System.out.println("Yes");
		}else{
			System.out.println("No");
		}
	}
}