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

template <typename T, typename U> void cmin(T &a, U b) {
  if (a > b) a = b;
}
template <typename T, typename U> void cmax(T &a, U b) {
  if (a < b) a = b;
}

signed main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);

  int N, M, C;
  cin >> N >> M >> C;

  if ((N == 1 && M == 2) || (N == 2 && M == 1)) return cout << "YES" << "\n", 0;
  if (N == 1 || M == 1) return cout << "NO" << "\n", 0;
  cout << ((N % 2 && M % 2) ? "NO" : "YES") << "\n";
}