import java.util.Scanner;
public class Yuki85{
	public static void main(String[] arg){
		Scanner sc = new Scanner(System.in);
		int n,m,c,res;
		n = sc.nextInt();
		m = sc.nextInt();
		c = sc.nextInt();
		res = n*m;
		if(res % 2 == 0){
			if(res == 2){
				System.out.println("YES");
			}else{
				if(n!=1 && m != 1){
					System.out.println("YES");
				}else{
					System.out.println("NO");
				}
			}
		}else{
			System.out.println("NO");
		}
	}
}