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