#include<iostream>
using namespace std;
int main()
{
    freopen ( "table.in", "r", stdin );
	freopen ( "table.out", "w" , stdout );
	int c,s;
	cin>>c>>s;
	if((c*s)%2!=0) cout<<"No"<<endl;
	else cout<<"Yes"<<endl;
return 0;
}