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 (GCC 5.4.1) (judge verdict: Accepted)

    #include<stdio.h>
    #include<string.h>
    int main(void){
       int A,B,sum,kake,hiku;
       scanf("%d %d",&A,&B);
       sum=A+B;
       kake=A*B;
       hiku=A-B;
       if((sum>=kake)&&(sum>=hiku)){
          printf("%d",sum);
       }else if((sum<=kake)&&(kake>=hiku)){
          printf("%d",kake);
       }else if((hiku>=kake)&&(sum<=hiku)){
          printf("%d",hiku);
       }


       return 0;
    }