
import java.util.Scanner;

public class Main {
    public static boolean debug = true;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();

        int p = a + b;
        int m = a - b;
        int d = a * b;

        if(p>m){
            if(p>d) {
                System.out.println(p);
            }else{
                System.out.println(d);
            }
        }else{
            if(m>d) {
                System.out.println(m);
            }else{
                System.out.println(d);
            }

        }


    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz