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.Linq;

namespace Atcoder
{
    class Program
    {
        static void Main(string[] args)
        {
            //入力受け取ってやる
            int[] rawinput = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int A = rawinput[0];int B = rawinput[1];

            int add = A + B;int subtract = A - B;int maultiply= A * B;
            if (add > subtract &&add > maultiply){
                Console.WriteLine(add);
            }else if(subtract > add && subtract > maultiply) 
            {
                Console.WriteLine(subtract);
            }
            else if(maultiply > add && maultiply > subtract){
                Console.WriteLine(maultiply);
            }
            else{
                Console.WriteLine("0");
            }

        }
    }
}