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<iostream>
#include<stdio.h>
#include<vector>
#include<algorithm>
#include<utility>
using namespace std;

int main(void)
{
  int x,y;
  int a[4];
  int max=0;
  cin>>x>>y;
  a[0]=x+y;
  a[1]=x*y;
  a[2]=x-y;

  for(int i=0;i<3;i++)
    {
      if(a[i]>max)max=a[i];
    }
  cout<<max<<endl;
  return 0;
}