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Score : $100$ points

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 $A \times B$.

Sample Input 1

3 1


Sample Output 1

4


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

Sample Input 2

4 -2


Sample Output 2

6


The largest is $4 - (-2) = 6$.

Sample Input 3

0 0


Sample Output 3

0