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: Wrong Answer)

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

namespace ABC098A
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, b, max;

            var word = Console.ReadLine().Split(' ');
            //整数A,Bの入力
            a = int.Parse(word[0]);
            b = int.Parse(word[1]);
            max = a + b;
            //最大値maxを求める
            if (max <= a - b)
                max = a - b;
            max = a * b;
            if (max <= a * b)
                max = a * b;

            Console.WriteLine(max);
            Console.ReadKey();
        }
    }
}