import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int[] p = {a+b, a-b, a*b};
    Arrays.sort(p);
    System.out.println(p[2]);
  }
} import java.util.*; util.* java public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int[] p = {a+b, a-b, a*b};
    Arrays.sort(p);
    System.out.println(p[2]);
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int[] p = {a+b, a-b, a*b};
    Arrays.sort(p);
    System.out.println(p[2]);
  } main {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int[] p = {a+b, a-b, a*b};
    Arrays.sort(p);
    System.out.println(p[2]);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int[] p = {a+b, a-b, a*b}; p {a+b, a-b, a*b} a+b a b a-b a b a*b a b Arrays.sort(p) Arrays.sort Arrays p System.out.println(p[2]) System.out.println System.out System System.out p[2] p 2 String[] args args public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int[] p = {a+b, a-b, a*b};
    Arrays.sort(p);
    System.out.println(p[2]);
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int[] p = {a+b, a-b, a*b};
    Arrays.sort(p);
    System.out.println(p[2]);
  }
} Main
import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int[] p = {a+b, a-b, a*b};
    Arrays.sort(p);
    System.out.println(p[2]);
  }
}