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 Ruby (2.3.3) (judge verdict: Runtime Error)

count = gets.to_i

strs = []

count.times.each do
  strs << gets.chomp
end

memo = {}

strs.each do |str|
  s = str.chars.sort.join
  
  if memo.key?(s)
    memo[s] += 1
  else
    memo[s] = 0
  end
end

puts memo.values.map { |n| (0..n).to_a.inject(:+) }.inject(:+)