#include <iostream>
using namespace std;

int main() {
    int N, M, C;
    cin >> N >> M >> C;

    if (N == 1 || M == 1) {
        if (N * M == 2) {
            cout << "YES" << endl;
        } else {
            cout << "NO" << endl;
        }
    } else if (N * M % 2 == 0) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }
}