#include <iostream>
using namespace std;
int main(){
	int N, M, C;
	cin >> N >> M >> C;
	if (N == 1 && M >= 3){
		cout << "NO" << endl;
	} else if (M == 1 && N >= 3){
		cout << "NO" << endl;
	} else if (N * M % 2 == 1){
		cout << "NO" << endl;
	} else {
		cout << "YES" << endl;
	}
}