using System;
using System.Linq;
class Program {
    static void Main() {
        string ans;
        int[] nmc = Console.ReadLine().Split().Select(int.Parse).ToArray();
        int n = nmc[0], m = nmc[1], c = nmc[2], s = n * m;
        if (n == 1 || m == 1) {
            ans = s == 2 ? "YES" : "NO";
        } else {
            ans = s % 2 == 0 ? "YES" : "NO";
        }
        Console.WriteLine(ans);
    }
}