Problem:
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

Solution in Perl (v5.18.2) (judge verdict: Accepted)

#!/usr/bin/perl

my ($aa,$bb) = map {$_ - 0} split(/\s+/o,<STDIN>);

my @c = ($aa + $bb, $aa - $bb, $aa * $bb);
my @d = sort {$a <=> $b} @c;

print "$d[2]\n";