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 Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.*;
public class Main {
    public static void main(String[] args) {
        // 自分の得意な言語で
        // Let's チャレンジ！！
 
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
      String s[]=line.split(" ",0);
      int n=Integer.parseInt(s[0]);
      int k=Integer.parseInt(s[1]);
      int a=n+k;
      int su=a-k;
      int m=a*k;
      int ans=a;
      if(ans<su)
        ans=su;
      if(ans<m)
        ans=m;
        System.out.println(ans);
    }
}