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-----
-13 3

-----Sample Output-----
-10

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

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