#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
int INF = 1e9;
int MOD = 1e9+7;
main(){
    int N,M,C;
    cin >> N >> M >> C;
    if((N%2)&(M%2) || (N == 1 && M != 2)|| (M == 1 && N != 2))cout << "NO" << endl;
    else cout << "YES" << endl;
}