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>

using namespace std;

int main(void)
{
  int a,b;  cin>>a>>b;
  int r1=a+b,r2=a-b,r3=a*b;
  
  if((r1>r2)&&(r1>r3)){cout<<r1<<endl;}
  else if((r2>r1)&&(r2>r3)){cout<<r2<<endl;}
  else if((r3>r1)&&(r3>r2)){cout<<r3<<endl;}
  else if((r1==r2)&&(r2==r3)){cout<<r2<<endl;}
  
  return 0;
}