You are given two integers A and B.
Find the largest value among A+B, A-B and $A \times B$.

-----Constraints-----
- -$1000 \leq A,B \leq 1000$
- All values in input are integers.

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

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

-----Sample Input-----
3 1

-----Sample Output-----
4

3+1=4, 3-1=2 and $3 \times 1=3$. The largest among them is 4.

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