import java.util.Scanner;

public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n=scanner.nextInt();
		int m=scanner.nextInt();
		int c=scanner.nextInt();
		if(n==1||m==1) {
			System.out.println(n*m==2?"YES":"NO");
		}else {
			System.out.println((n%2==1&&m%2==1)?"NO":"YES");
		}
	}
}