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: Accepted)

#include<iostream>
#include <algorithm>
#include <functional>
#include<vector>
#include<math.h>
#include <assert.h>
#include<bitset>
#include<string>
#include <deque>
#include<queue>
#include <iomanip>
#include<map>
#include <random>
#include<type_traits>
#include<stack>
#include <sstream> 
#include <limits>
#include <numeric>
#include<string.h>
#include<set>
#include <climits>
using namespace std;
typedef unsigned long long ull;
#define ll long long int
ll mod = 1000000007;
//typedef vector<int> V;
//typedef vector<V> VV;
//typedef vector<VV> VVV;


int main() {
	ll a, b,c,d,e;
	cin >> a>>b;
	c = max(a + b, a - b);
	c = max(c, a*b);
	cout << c << endl;
	return 0;
}