#include <iostream>
#include <stdio.h>
#include <cstring>
#include <math.h>
#include <algorithm>
#include <vector>
#define rep(i,n) for(int i=0;i<n;i++)
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define ll long long
#define LL long long
#define mass 1000000007
using namespace std;


int main(){
	int n,m,c;
	cin>>n>>m>>c;

	if(n*m%2==1 || ((m==1 || n==1 ) && m*n>3 )){
		cout<<"NO"<<endl;
	}else{
		cout<<"YES"<<endl;
	}

	return 0;
	

}