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: Wrong Answer)

#define _CRAT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<math.h>

int main()
{
    int a, b, c;

    scanf("%d%d", &a, &b);

    if(a>=0 && b>=0){

        c=a+b;

        if(c<a*b){
            c=a*b;
        }

        printf("%d", c);

        //if(a*b > a+b){
        //    printf("%d", a*b);
        //}
        //else{
        //    printf("%d", a+b);
        //}
    }

    else if(a<0||b<0){

        c=a+b;

        if(c<a-b){
            //printf("%d", a+b);
            c=a-b;
        }

        else{
            //printf("%d", a-b);
            //c=a-b;
        }
        printf("%d", c);
    }

    else if(a<0 && b<0){
        printf("%d", a*b);
    }

    return 0;
}