import java.util.*;
class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int A = sc.nextInt();
int B = sc.nextInt();
if(B<0){
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