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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<iostream>
#include<algorithm>
#include<functional>
#include<string>
#include<vector>
#include<utility>
#include<queue>
using namespace std;
#define LL long long
#define MOD 1000000007

int a, b, c, d, n, m, A[10], ans = 0;
string s;

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