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)

function main(lines) {
  const lin = lines[0].split(" ");
  const a = Number(lin[0]);
  const b = Number(lin[1]);
  if(isNaN(b))throw new Error("b in not a number");
  var m = a + b;
  if (a - b > m) m = a - b;
  if (a * b > m) m = a * b;
  console.log(m);
}
main(require('fs').readFileSync('/dev/stdin', 'UTF-8'));