Problem Statement

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

Input

Input is given from Standard Input in the following format:
A B

Output

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

Constraints

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

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.

见题面 Input 部分

见题面 Output 部分