import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());

        System.out.println(Math.max(A + B, Math.max(A - B, A * B)));
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());

        System.out.println(Math.max(A + B, Math.max(A - B, A * B)));
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());

        System.out.println(Math.max(A + B, Math.max(A - B, A * B)));
    } main {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());

        System.out.println(Math.max(A + B, Math.max(A - B, A * B)));
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int A = Integer.parseInt(sc.next()); A Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int B = Integer.parseInt(sc.next()); B Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc System.out.println(Math.max(A + B, Math.max(A - B, A * B))) System.out.println System.out System System.out Math.max(A + B, Math.max(A - B, A * B)) Math.max Math A + B A B Math.max(A - B, A * B) Math.max Math A - B A B A * B A B String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());

        System.out.println(Math.max(A + B, Math.max(A - B, A * B)));
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());

        System.out.println(Math.max(A + B, Math.max(A - B, A * B)));
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int A = Integer.parseInt(sc.next());
        int B = Integer.parseInt(sc.next());

        System.out.println(Math.max(A + B, Math.max(A - B, A * B)));
    }
}