Problem:
Score : 100 points

Problem Statement

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 1

-13 3

Sample Output 1

-10

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

Sample Input 2

1 -33

Sample Output 2

34

The largest number among A + B = -32, A - B = 34, and A \times B = -33 is 34.

Sample Input 3

13 3

Sample Output 3

39

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

Solution in PHP7 (7.0.15) (judge verdict: Wrong Answer)

<?php

$a = -11;
$b = 23;

$int = '';
$sub = '';
$multi  = '';

$maxInt = '';
$maxSub = '';
$maxMulti = '';
 
$int = $a + $b;
$sub = $a - $b;
$multi = $a * $b;

//それぞれの最大値
$max = max($int, $sub, $multi);

echo $int."\n".$sub."\n".$multi."\n";
echo $max;


?>