import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt(), M = sc.nextInt(), C = sc.nextInt();
        sc.close();
        if (N * M % 2 == 1) System.out.print("NO");
        else if (N == 1 || M == 1) {
            if (N == 2 || M == 2) System.out.print("YES");
            else System.out.print("NO");
        }
        else System.out.print("YES");
    }
}