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

#define int long long

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