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: Runtime Error)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication17
{
  class Program
  {
  static void Main(string[] args)
  {
    int A;
    int B;
    int max;
    A = int.Parse(Console.ReadLine());
    B = int.Parse(Console.ReadLine());
    max = A+B;
    if(A-B>max)
    {
      max = A-B;
    }
    if(A*B>max)
    {
      max = A*B;
    }
    Console.WriteLine(max);
    Console.ReadLine();
  }
  }
}