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: Accepted)

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)
        {
            //整数A Bの入力
            int A, B, max;

            var word = Console.ReadLine().Split(' ');

            A = int.Parse(word[0]);
            B = int.Parse(word[1]); 

            //最大値maxを求める
            max = A + B;

            if (max < A - B)
				max = A - B;
            if (max < A * B)
				max = A * B;
            

			
                           

            //最大値を出力(表示)
            Console.WriteLine(max);
            //入力
            Console.ReadKey();




        }
    }
}