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;

namespace atcorder
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            atcorder.Add_Sub_Mul.Run();
        }
    }
      public class Add_Sub_Mul
    {
        public Add_Sub_Mul()
        {
        }
        public static void Run(){
            int A, B;
            string s = Console.ReadLine();
            A = int.Parse(s.Split(' ')[0]);
            B = int.Parse(s.Split(' ')[1]);
            Console.WriteLine(Math.Max(A + B, Math.Max(A - B, A * B)));
        }
    }
}