import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        int n = koko.nextInt();
        int m = koko.nextInt();
        int c = koko.nextInt();
        if(n%2!=0&&m%2!=0){
            System.out.println("NO");
        }else if(n==1||m==1){
            if(n==2||m==2){
                System.out.println("YES");
            }else{
                System.out.println("NO");
            }
        }else{
            System.out.println("YES");
        }
    }
}