#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

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

    if((n == 1 && m != 2) || (n * m) % 2 == 1)
        cout << "NO" << endl;
    else
        cout << "YES" << endl;

    return 0;
}