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: Accepted)

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using static System.Console;

namespace ConsoleApplication1
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            Output(Solve(Input()));
        }

        static int Solve(IList<int> input)
        {
            var a = input[0];
            var b = input[1];
            return Math.Max(Math.Max((a + b), (a - b)), (a*b));
        }
            

        static IList<int> Input()
        {
            var input = ReadLine()
                .Split(' ')
                .Select(int.Parse)
                .ToList();

            return input;
        }

        static void Output<T>(T a)
        {
            WriteLine(a);
        }
        static void Output(IEnumerable<int> list)
        {
            var sw = new StreamWriter(OpenStandardOutput()) {AutoFlush = false};
            SetOut(sw);

            Out.Flush();
        }
    }
}