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(input){
	input = input.split(' ');
    input = input.map(input=>parseInt(input,10));
    a = input[0] + input[1];
    b = input[0] - input[1];
    c = input[0] * input[1];
    if (max === -0 || max === +0) {
    console.log(0);
    }else{
    console.log(Math.max(a, b, c));
    }  
}
 
Main(require("fs").readFileSync("/dev/stdin","utf8"));