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

int main(void) {
	int N, M, C;
	cin >> N >> M >> C;
	
	if(N > M) swap(N, M);
	
	if(N == 1) cout << (M == 2 ? "YES" : "NO") << "\n";
	else cout << (N * M % 2 == 0 ? "YES" : "NO") << "\n";
	
	return 0;
}