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

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