#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>

using namespace std;

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