import java.io.*; import java.util.*; import java.math.*; class Main { public static void out (Object o) { System.out.println(o); } public static void main (String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String[] line = br.readLine().split(" "); int n = Integer.parseInt(line[0]); int m = Integer.parseInt(line[1]); out(n * m % 2 == 0 && n * m != 2 ? "YES" : "NO"); } }