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: Wrong Answer)

//============================================================================
// Name        : AOJ.cpp
// Author      : Akari Fujii
// Version     :
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <iostream>
#include <cctype>
#include <string>
#include<algorithm>

using namespace std;
typedef long long ll;
int main(){

	int a,b;
	int e=0,f=0,g=0;
	int max=0;

	cin>>a;
	cin>>b;

	e=a+b;
	f=a-b;
	g=a*b;

	if(max<e){
		max=e;
	}
	if(max<f){
		max=f;
	}
	if(max<g){
		max=g;
	}

	cout<<max<<endl;

	return 0;
}