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 <math.h>
#include <stdlib.h>
#define NEW(p,n) {p = malloc((n)*sizeof(p[0]));}

int main(){
  int A,B,a,b,c,x;
  scanf("%d %d",&A,&B );
  a=A+B;
  b=A-B;
  c=A*B;
  x=a;
  if(a<=b){
    x=b;
  if(b<=c)
   x=c;
  }else{//a>=bの時
   if(a<=c)
   x=c;
 }
 printf("%d",x);
  return 0;
}