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.Diagnostics;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Text;

class Procon {
    static void Main (string[] agrs) {
        int A = Int ();
        int B = Int ();

        Dbg (Max (A + B, A - B, A * B));
    }

    static Scanner cin = new Scanner ();
    const int M = 1000000007;
    static StreamWriter sw = new StreamWriter (Console.OpenStandardOutput ()) { AutoFlush = false };
    static void Dbg (object a) => Console.WriteLine (a);
    static void Dbg<T> (IEnumerable<T> a) => Dbg (string.Join (" ", a));
    static void Dbg<T> (params object[] a) => Dbg (string.Join (" ", a));
    static void Dbgs<T> (IEnumerable<T> a) => Dbg (string.Join ("\n", a));
    static void Dbgs<T> (params object[] a) => Dbg (string.Join ("\n", a));
    static void Dbgs (object a) => Console.WriteLine (a);
    static int Int () => cin.nextInt ();
    static long Long () => cin.nextLong ();
    static int[] Ints () => cin.arrayInt ();
    static long[] Longs () => cin.arrayLong ();
    static double Double () => cin.nextDouble ();
    static double[] Doubles () => cin.arrayDouble ();
    static string String () => cin.nextString ();
    static string[] Strings () => cin.arrayString ();
    static T Max<T> (params T[] a) => a.Max ();
    static T Min<T> (params T[] a) => a.Min ();
}

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;
    }
}