#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

int main() {
    int h, w; cin >> h >> w;
    int _; cin >> _;
    if (h > w) swap(h, w);
    if (h == 1) {
        cout << (w <= 2 ? "YES" : "NO") << endl;
    } else {
        cout << (h * w % 2 == 0 ? "YES" : "NO") << endl;
    }
    return 0;
}