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;
int q = A-B;
int r = A*B;
int max = p;
if(max<q){
max = q;
}
if(max<r){
max = r;
}
System.out.println(max);
}
} 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;
int q = A-B;
int r = A*B;
int max = p;
if(max<q){
max = q;
}
if(max<r){
max = r;
}
System.out.println(max);
}
} 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;
int q = A-B;
int r = A*B;
int max = p;
if(max<q){
max = q;
}
if(max<r){
max = r;
}
System.out.println(max);
} main {
Scanner sc = new Scanner(System.in);
int A = sc.nextInt();
int B = sc.nextInt(); 
int p = A+B;
int q = A-B;
int r = A*B;
int max = p;
if(max<q){
max = q;
}
if(max<r){
max = r;
}
System.out.println(max);
} 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; p A+B A B int q = A-B; q A-B A B int r = A*B; r A*B A B int max = p; max p if(max<q){
max = q;
} max<q max q {
max = q;
} max = q max q if(max<r){
max = r;
} max<r max r {
max = r;
} max = r max r System.out.println(max) System.out.println System.out System System.out max 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;
int q = A-B;
int r = A*B;
int max = p;
if(max<q){
max = q;
}
if(max<r){
max = r;
}
System.out.println(max);
}
} 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;
int q = A-B;
int r = A*B;
int max = p;
if(max<q){
max = q;
}
if(max<r){
max = r;
}
System.out.println(max);
}
} 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;
int q = A-B;
int r = A*B;
int max = p;
if(max<q){
max = q;
}
if(max<r){
max = r;
}
System.out.println(max);
}
}
