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 add 
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] str = Console.ReadLine().Split();
            int a = int.Parse(str[0]);
            int b = int.Parse(str[1]);
            int c = (a + b);
            int d = (a - b);
            int e = (a * b);

            if (c >= d && c >= e && a >= -1000 && b <= 1000)
            {
                Console.WriteLine("{0}", c);
            }
            else if (d >= c && d >= e && a >= -1000 && b <= 1000)
            {
                Console.WriteLine("{0}", d);
            }
            else if (e >= c && e >= d && a >= -1000 && b <= 1000)
            {
                Console.WriteLine("{0}", e);
            }
            
        }
    }
}