Problem Statement

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 $A \times B$.