#include <iostream>
using namespace std;

int N, M, C;

string res(void){
    if(N == 1 || M == 1){
        if(N * M == 2){
            return "YES";
        }else{
            return "NO";
        }
    }
    if(N * M % 2 == 0){
        return "YES";
    }else{
        return "NO";
    }
}

int main(){
    cin >> N >> M >> C;
    cout << res() << endl;
    return 0;
}