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: Wrong Answer)

function main(input) {
	var a = input.split(' ');
	a[0] = parseInt(a[0], 10);
	a[1] = parseInt(a[1], 10);
	var a1 = a[0]+a[1];
	var a2 = a[0]-a[1];
	var a3 = a[0]*a[1];
	var a4 = Math.max(a1,a2,a3);
	console.log(a4);
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));