import java.util.Scanner;

public class No85 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt() , m = scanner.nextInt() , c = scanner.nextInt();
		scanner.close();
		
		if((Math.min(n, m) == 1 && Math.max(n, m) > 2) || n*m%2 == 1){
			System.out.println("NO");
		}else {
			System.out.println("YES");
		}
	}
	


}