
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);
			}
		}
	}
}
/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