
import java.util.Scanner;

public class Main {

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

		if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(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 = sc.nextInt();
		int b = sc.nextInt();

		if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();

		if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();

		if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		}
	} 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 if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		} (a+b)>(a-b) (a+b) a b (a-b) a b {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		} if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			} (a+b)>(a*b) (a+b) a b (a*b) a b {
				System.out.println(a+b);
			} System.out.println(a+b) System.out.println System.out System System.out a+b a b {
				System.out.println(a*b);
			} System.out.println(a*b) System.out.println System.out System System.out a*b a b {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		} if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			} (a-b)>(a*b) (a-b) a b (a*b) a b {
				System.out.println(a-b);
			} System.out.println(a-b) System.out.println System.out System System.out a-b a b {
				System.out.println(a*b);
			} System.out.println(a*b) System.out.println System.out System System.out a*b a b 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();

		if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		}
	}
} public class Main {

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

		if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		}
	}
} Main

import java.util.Scanner;

public class Main {

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

		if ((a+b)>(a-b)) {
			if((a+b)>(a*b)) {
				System.out.println(a+b);
			}else {
				System.out.println(a*b);
			}
		}else {
			if((a-b)>(a*b)) {
				System.out.println(a-b);
			}else {
				System.out.println(a*b);
			}
		}
	}
}