#include <algorithm>
#include <climits>
#include <cstdlib>
#include <vector>
#include <cctype>
#include <deque>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <ctime>
#include <stack>
#include <cstdio>
#include <string>
#include <iomanip>
#include <cstring>
#include <iostream>
#include <functional>

using namespace std;

typedef long long ll;


#define LLMAX LLONG_MAX
#define IMAX INT_MAX


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