import java.util.Scanner; public class Yukicoder85 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(), m = sc.nextInt(); sc.next(); if (((n * m) % 2 == 0 && n > 1 && m > 1) || n * m == 2) System.out.println("YES"); else System.out.println("NO"); } }