Problem Statement

We have two integers: $A$ and $B$.

Print the largest number among $A + B$, $A - B$, and $A \\times B$.

Constraints

• All values in input are integers.
• $\-100 \\leq A,\\ B \\leq 100$

Input

Input is given from Standard Input in the following format:

$A$ $B$

Output

Print the largest number among $A + B$, $A - B$, and $A \\times B$.

Sample Input 1

-13 3

Sample Output 1

-10

The largest number among $A + B = -10$, $A - B = -16$, and $A \\times B = -39$ is $\-10$.

Sample Input 2

1 -33

Sample Output 2

34

The largest number among $A + B = -32$, $A - B = 34$, and $A \\times B = -33$ is $34$.

Sample Input 3

13 3

Sample Output 3

39

The largest number among $A + B = 16$, $A - B = 10$, and $A \\times B = 39$ is $39$.