#include <iostream>
#include <cstdio>

using namespace std;

int main() {
	int n, m, c;
	bool isOK = false;

	cin >> n >> m >> c;
	if (n * m == 1) {
		isOK = false;
	} else if (n == 1 || m == 1) {
		isOK = (n * m == 2);
	} else if (n * m % 2 == 0) {
		isOK = true;
	}

	cout << (isOK ? "YES" : "NO") << endl;
	return 0;
}