Problem Statement

We have two integers: A and B.
Print the largest number among A + B, A - B, A x B.

Constraints

• All values are integers
• A and B are integers between -100 and 100

Input

Input is in the following format:

A
B

Output

Print the largest number among A + B, A - B, A x B.

Samples

Sample 1

A + B = -10
A - B = -16
A x B = -39

Sample 2

A + B = -32
A - B = 34
A x B = -33

Sample 3

A + B = 16
A - B = 10
A x B = 39