import java.util.*;
import java.math.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        int x = sc.nextInt();
        int y = sc.nextInt();
        int c = sc.nextInt();
        int n = x*y;
        if (x == 1 || y == 1) {
            if (x == 2 || y == 2) {
                System.out.println("YES");
            } else {
                System.out.println("NO");
            }
        } else if (n%2!=0) {
            System.out.println("NO");
        } else {
            System.out.println("YES");
        }
    }
}