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 JavaScript (node.js v5.12) (judge verdict: Runtime Error)

// https://abc098.contest.atcoder.jp/tasks/abc098_a

function parse(input) {
  return input.trim().split(" ").map((number) => parseInt(number, 10))
}

function f(a, b) {
  const wa = a + b
  const sa = a - b
  const seki = a * b

  let max = wa
  max = sa > max ? sa : max
  max = seki > max ? seki : max

  return max
}

module.exports = {
  parse,
  f,
}

function Main(input) {
  const arr = parse(input)
  const a = arr[0]
  const b = arr[1]

  console.log(f(a, b))
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"))