#include <bits/stdc++.h>
using namespace std;
#define rep(i, a) for (int i = 0; i < (a); i++)
#define rep2(i, a, b) for (int i = (a); i < (b); i++)
#define repr(i, a) for (int i = (a) - 1; i >= 0; i--)
#define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--)
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
template<class T1, class T2> bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
typedef long long ll;

int main() {
	int n, m, c;
	cin >> n >> m >> c;
	bool ans;
	if (n == 1 || m == 1) {
		ans = n == 1 && m == 1;
	}
	else {
		ans = n % 2 == 0 || m % 2 == 0;
	}
	cout << (ans ? "YES" : "NO") << endl;
	return 0;
}