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

int main() {
    int N,M,C;
    cin>>N>>M>>C;
    if ((N*M)%2 == 0){
        if ((N==1) or (M==1)){
            if (N*M==2){
                cout<<"YES"<<endl;
            }
            else{
                cout<<"NO"<<endl;
            }
           
        }
        else{
            cout<<"YES"<<endl;
        }
    }
    else{
        cout<<"NO"<<endl;
    }
}