#include <bits/stdc++.h>

int main() {
  int n; scanf("%d", &n);
  int m; scanf("%d", &m);
  int c; scanf("%d", &c);
  puts(((n != 1 and m % 2 == 0) or (m != 1 and n % 2 == 0) or n * m == 2) ? "YES" : "NO");
       
  return 0;
}