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)

#include <bits/stdc++.h>
using namespace std;

#define input int t;cin>>t;while(t--)
#define for0(i,n) for(int i=0;i<n;i++)
#define for1(i,n) for(int i=1;i<=n;i++) 
#define fab(i,a,b) for(int i=a;i<=b;i++)
#define ll long long

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    ll a,b;
    cin>>a>>b;
    ll d=a+b,c=a-b,e=a*b;
    if(d>c&&d>e)
    {
        cout<<d<<endl;
    }
    else if(c>d&&c>e)
    {
        cout<<c<<endl;
    }
    else
    {
        cout<<e<<endl;
    }
	return 0;
}