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: Accepted)

<?php

$line = trim(fgets(STDIN));

list($a, $b) = explode(' ', $line);


$res[] = (int) $a + (int) $b;

$res[] = (int) $a - (int) $b;

$res[] = (int) $a * (int) $b;

echo max($res[0], $res[1], $res[2]);