#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define llong long long

int main() {
    int n, m, c;
    cin >> n >> m >> c;

    if(n * m % 2 == 1) {
        cout << "NO" << "\n";
    } else if((n == 1 || m == 1) && max(m, n) > 2) {
        cout << "NO" << "\n";
    } else {
        cout << "YES" << "\n";
    }
}