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

#define int long long

signed main(){
  int a,b,c;cin>>a>>b>>c;
  if(a==1){
    if(b==1||b==c)cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
    return 0;
  }
  swap(a,b);
  if(a==1){
    if(b==1||b==c)cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
    return 0;
  }
  cout<<(((a*b)&1?"YES":"NO"))<<endl;
}