Problem:
Score : 100 points

Problem Statement

We have two integers: A and B.

Print the largest number among A + B, A - B, and A \times B.

Constraints

All values in input are integers.

-100 \leq A,\ B \leq 100

Input

Input is given from Standard Input in the following format:

A B

Output

Print the largest number among A + B, A - B, and A \times B.

Sample Input 1

-13 3

Sample Output 1

-10

The largest number among A + B = -10, A - B = -16, and A \times B = -39 is -10.

Sample Input 2

1 -33

Sample Output 2

34

The largest number among A + B = -32, A - B = 34, and A \times B = -33 is 34.

Sample Input 3

13 3

Sample Output 3

39

The largest number among A + B = 16, A - B = 10, and A \times B = 39 is 39.

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ABC137A
{
    class Program
    {
        static void Main(string[] args)
        {
            var word = Console.ReadLine().Split();
           double a = double.Parse(word[0]);
           double b = double.Parse(word[1]);
            double max = a + b;


            if (max <= (a * b))
            {
                max = a * b;

                if (max <= (a - b))
                    max = a - b;
            }
            Console.WriteLine(max);
            Console.ReadKey();
            


        }
    }
}