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

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);  
	int n, m, c;
	cin >> n >> m >> c;
	if(n == 1 || m == 1) {
		if(n * m == 2) {
			cout << "YES" << endl;
		} else {
			cout << "NO" << endl;
		}
	}
	if(n % 2 && m % 2) {
		cout << "NO" << endl;
	} else {
		cout << "YES" << endl;
	}
	return 0;
}