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: Accepted)

#include <iostream>
#include <cmath>
#include <vector>
#include <queue>
#include <string>
#include <map>
#include <ios>
#include <iomanip>
#include <limits>
#include <algorithm>
#include <sstream>
#include <bitset>
#define REP(i, n) for(int i=0; i<n; i++)
#define FOR(i, s, n) for(int i=s; i<n; i++)

using namespace std;

int main(){
    int A, B;
    int ans;
    cin >> A >> B;
    ans = max({A+B, A-B, A*B});
    cout << ans << endl;
}