/* -*- coding: utf-8 -*-
 *
 * 85.cc: No.85 TVザッピング(1) - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n, m, c;
  cin >> n >> m >> c;

  if (n < m) swap(n, m);

  if (m == 1) cout << (n <= 2 ? "YES" : "NO") << endl;
  else cout << (((n * m) & 1) ? "NO" : "YES") << endl;
  
  return 0;
}