import java.math.*;
import java.util.*;
 
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        int k = sc.nextInt();
        if( (n==1&&m==2) || (m==1&&n==2) ) {
        	System.out.println("YES");
        	return;
        }
        if( n%2==0 || m%2==0){
        	System.out.println("YES");
        	return;
        }
        System.out.println("NO");
    }
}