#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 100000000000000000


int main(){
	
	int n,m,c;
	cin>>n>>m>>c;
	bool f;
	if((n==1||m==1)&&n*m>=3){
		f = false;
	}
	else{
	
		if(n*m%2==0)f = true;
		else f = false;
	}
	cout<<(f?"YES":"NO")<<endl;
	
	return 0;
}