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 sum, sub, mul;
  int a, b;
  int max;

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

  sum = a+b;
  //printf("%d", sum);
  sub = a-b;
  //printf("%d", sub);
  mul = a*b;
  //printf("%d", mul);

  if(sum > sub) {
    max = sum;
  }
  else {
    max = sub;
  }

  if(max < mul) {
    max = mul;
  }

  printf("%d", max);

  return 0;

}