#include using namespace std; #define int long long #define rep(i,n) for(int i=0;i<(int)(n);i++) #define repi(i,a,b) for(int i=(int)(a);i<(int)(b);i++) #define all(x) (x).begin(),(x).end() #define pb push_back #define mp make_pair #define mt make_tuple typedef pair pii; typedef vector vi; typedef vector vvi; const int inf = 1LL<<60; const int mod = 1e9 + 7; const double eps = 1e-9; /*{ }*/ signed main() { int n, m, c; cin >> n >> m >> c; if((n == 1 and m >= 3) or (n >= 3 and m == 1)) cout << "NO" << endl; else if(n%2 and m%2) cout << "NO" << endl; else cout << "YES" << endl; return 0; }