#include <iostream>
using namespace std;
int main(){
	int n,m,c;	cin>>n>>m>>c;
	if(n==1||m==1){
		if(n+m==3)	cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
		return 0;
	}
	if(n%2==0||m%2==0)	cout<<"YES"<<endl;
	else 	cout<<"NO"<<endl;
	return 0;
}