#include <bits/stdc++.h>
using namespace std;

#define int long long
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int inf = 1LL<<60;
const int mod = 1e9 + 7;
const double eps = 1e-9;

/*{
}*/

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

  if((n == 1 and m >= 3) or (n >= 3 and m == 1)) cout << "NO" << endl;
  else if(n%2 and m%2) cout << "NO" << endl;
  else cout << "YES" << endl;

  return 0;
}