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++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<iostream>
#include<vector>
#include<algorithm>
#include<iomanip>
#include<cmath>
#include<string>
#include<cstdlib>

using namespace std;

int main()
{
  long long A, B;
  cin >> A >> B;

  long long a=A+B;
  long long b=A-B;
  long long c=A*B;

  if(a<b)
    {
      if(b<c)
	cout << c << endl;
      else if(c<b)
	cout << b << endl;
    }
  else if(b<a)
    {
      if(a<c)
	cout << c << endl;
      else
	cout << a << endl;
    }


  return 0;
}