Problem:
Score : 100 points

Problem Statement

We have two integers: A and B.

Print the largest number among A + B, A - B, and A \times B.

Constraints

All values in input are integers.

-100 \leq A,\ B \leq 100

Input

Input is given from Standard Input in the following format:

A B

Output

Print the largest number among A + B, A - B, and A \times B.

Sample Input 1

-13 3

Sample Output 1

-10

The largest number among A + B = -10, A - B = -16, and A \times B = -39 is -10.

Sample Input 2

1 -33

Sample Output 2

34

The largest number among A + B = -32, A - B = 34, and A \times B = -33 is 34.

Sample Input 3

13 3

Sample Output 3

39

The largest number among A + B = 16, A - B = 10, and A \times B = 39 is 39.

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

/*
ID:dyx_6661
TASK:
LANG:
*/
#include<cstdio>
#include<cstring>
#include<cmath>
#include<queue>
#include<stack>
#include<algorithm>
#include<deque>
#include<set>
#include<map>
#include<vector>
#include<iostream>
using namespace std;
typedef long long int ll;
typedef double db;
typedef string str;
typedef pair<int,int> pa;
typedef vector<int> vec;

int A,B; 

int main(){
//  freopen(".in","r",stdin);
//  freopen(".out","w",stdout);
    scanf("%d%d",&A,&B);
    printf("%d",max(A-B,max(A+B,A*B)));
	return 0;
}