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 max(int x, int y){
  if(x<=y)
  return y;
  else
  return x;
}

int main(void) {
  int a, b;
  scanf("%d%d", &a, &b);
  int add, sub, mul;
  add=a+b;
  sub=a-b;
  mul=a*b;
  
  printf("%d\n", max(add, max(sub, mul)));
  
  return 0;
}