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: Runtime Error)

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)
        {
            var n = int.Parse(ReadLine());
            var dic = new Dictionary<string, int>();
            var cnt = 0;
            for (var i = 0; i < n; i++)
            {
                var input = ReadLine();
                var key = string.Concat(input.OrderBy(c => c));
                if (dic.ContainsKey(key))
                {
                    cnt += dic[key];
                    dic[key]++;
                }
                else
                {
                    dic.Add(key, 1);
                }
            }
            WriteLine(cnt);
        }
    }
}