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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;


public class Test
{	
    public static void Main()
	{
	    int[] n = Console.ReadLine().Split(' ').Select(s => int.Parse(s)).ToArray();
        List <int> list = new List<int>();
        list.Add(n[0]+n[1]);
        list.Add(n[0]-n[1]);
        list.Add(n[0]*n[1]);
        list.Sort();
        Console.WriteLine(list[list.Count-1]);
	} 
}