#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
signed main(){
  Int n,m,c;
  cin>>n>>m>>c;
  cout<<((n*m!=2)&&(n==1||m==1||((n*m)&1))?"NO"s:"YES"s)<<endl;
  return 0;
}