Problem:
Score : 100 points

Problem Statement

We have two integers: A and B.

Print the largest number among A + B, A - B, and A \times B.

Constraints

All values in input are integers.

-100 \leq A,\ B \leq 100

Input

Input is given from Standard Input in the following format:

A B

Output

Print the largest number among A + B, A - B, and A \times B.

Sample Input 1

-13 3

Sample Output 1

-10

The largest number among A + B = -10, A - B = -16, and A \times B = -39 is -10.

Sample Input 2

1 -33

Sample Output 2

34

The largest number among A + B = -32, A - B = 34, and A \times B = -33 is 34.

Sample Input 3

13 3

Sample Output 3

39

The largest number among A + B = 16, A - B = 10, and A \times B = 39 is 39.

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

class Procon {
    public Procon () { }
    static void Main (string[] agrs) {
        new Procon ().Do ();
    }

    Scanner cin;
    public void Do () {
        cin = new Scanner ();

        int A = cin.nextInt ();
        int B = cin.nextInt ();

        Console.WriteLine (Math.Max (Math.Max (A + B, A - B), A * B));
    }
}

class Scanner {
    string[] s;
    int i;
    int max_i;

    public Scanner () {
        s = new string[0];
        max_i = 0;
        i = 0;
    }

    public string nextString () {
        if (i >= s.Length) {
            s = Console.ReadLine ().Split (' ');
            max_i = s.Length;
            i = 0;
            if (max_i == 0) {
                return "";
            }
            return s[i++];
        } else {
            return s[i++];
        }
    }

    public int nextInt () {
        return int.Parse (nextString ());
    }

    public long nextLong () {
        return long.Parse (nextString ());
    }

    public double nextDouble () {
        return double.Parse (nextString ());
    }

    public string[] arrayString () {
        return Console.ReadLine ().Split (' ');
    }

    public int[] arrayInt () {
        string[] str = Console.ReadLine ().Split (' ');
        int[] array = new int[str.Length];
        for (int i = 0; i < str.Length; i++) {
            array[i] = int.Parse (str[i]);
        }
        return array;
    }

    public long[] arrayLong () {
        string[] str = Console.ReadLine ().Split (' ');
        long[] array = new long[str.Length];
        for (int i = 0; i < str.Length; i++) {
            array[i] = long.Parse (str[i]);
        }
        return array;
    }

    public double[] arrayDouble () {
        string[] str = Console.ReadLine ().Split (' ');
        double[] array = new double[str.Length];
        for (int i = 0; i < str.Length; i++) {
            array[i] = double.Parse (str[i]);
        }
        return array;
    }
}