package net.ipipip0129.yukicoder.no85;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int pos_x = scan.nextInt();
        int pos_y = scan.nextInt();

        if (pos_x % 2 == 0 || pos_y % 2 == 0) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
    }
}