#include <iostream>
using namespace std;

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