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 PHP (5.6.30) (judge verdict: Wrong Answer)

<?php

$n = intval(trim(fgets(STDIN)));

$count=0.0;
$array = [];
for ($i=0; $i<$n; $i++) {
    $str = trim(fgets(STDIN));
    $sArr = str_split($str);
    sort($sArr); 
    $newS = implode('',$sArr);

    foreach ($array as $s) {
        if ( strcmp($s, $array[$j]) == 0 ) {
            $count++;
        }
    }

    $array[] = $newS;
}

echo "$count\n";