#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <cmath>
#include <iomanip>
#include <map>
using namespace std;
typedef long long LL;

int main(){
    int n, m, c;
    cin >> n >> m >> c;
    if(n == 1 || m == 1){
        if(max(m, n) == 2){
            cout << "YES" << endl;
        }else{
            cout << "NO" << endl;
        }
    }else if(m*n%2 == 1){
        cout << "NO" << endl;
    }else{
        cout << "YES" << endl;
    }
    return 0;
}