import java.util.Scanner;


public class Main_yukicoder85 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int h = sc.nextInt();
        int w = sc.nextInt();
        @SuppressWarnings("unused")
		int c = sc.nextInt();

        int b = Math.max(h, w);
        int s = Math.min(h, w);
        if (s == 1 && b > 2) {
        	System.out.println("NO");
        } else if (s == 1 && b <= 2) {
        	System.out.println("YES");
        } else if (s % 2 == 1 && b % 2 == 1) {
        	System.out.println("NO");
        } else {
        	System.out.println("YES");
        }

        sc.close();
    }
}