#include <bits/stdc++.h>
#define p(s) cout<<(s)<<endl
using namespace std;

int main() {
	int N,M,C;
	cin>>N>>M>>C;
	string ans="NO";
	if(N*M<=2)ans="YES";
	else if(!(N*M%2)) ans="YES";
	p(ans);
	return 0;
}