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;

class Hoge {
    public static void Main()
    {
        string[] str = Console.ReadLine().Split(' ');
        int a = int.Parse(str[0]);
        int b = int.Parse(str[1]);
        List<int> aa = new List<int> { };

        aa.Add(a + b);
        aa.Add(a - b);
        aa.Add(a * b);
        int max = 0;

        for (int i = 0; i < 2; i++)
        {
            if(aa[i] > aa[i + 1])
            {
                max = aa[i];
            }
        }
        Console.WriteLine(max);
    }
}