import java.util.*;
import static java.lang.Math.*;
 
public class ppp {
	
	
		
  public static void main(String[] args) {
	  Scanner sc=new Scanner(System.in);
	  int n=sc.nextInt();
	  int m=sc.nextInt();
	  int c=sc.nextInt();
	  if(n*m==2)System.out.println("YES");
	  else if(n==1 || m==1)System.out.println("NO");
	  else if((n*m)%2==1)System.out.println("NO");
	  else System.out.println("YES");
	  
  }}