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>
int main(void){
    int a,b;
    scanf("%d %d",&a,&b);
    if(a+b>a-b&&a+b>a*b) printf("%d\n",a+b);
    if(a+b<a-b&&a-b>a*b) printf("%d\n",a-b);
    if(a*b>a-b&&a+b<a*b) printf("%d\n",a*b);
    else if(a+b==a*b||a+b==a-b) printf("%d\n",a+b);
    else if(a-b==a*b) printf("%d\n",a-b);
    else if(a==0&&b==0) printf("0\n");
    return 0;
}