#include <iostream>
using namespace std;

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