#include <bits/stdc++.h>

using namespace std;

int main() {
  int n, m, c;
  cin >> n >> m >> c;
  if (n == 1 || m == 1) cout << (c == 1 || c == n * m ? "YES" : "NO") << endl;
  else cout << (n * m % 2 ? "NO" : "YES") << endl;
}