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, tasu, hiku, kakeru;

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

  tasu = a + b;
  hiku = a - b;
  kakeru = a * b;

  if(tasu >= hiku){
    if(tasu >= kakeru){
      printf("%d",tasu);
    }
    else{
      printf("%d",kakeru);
    }
  }
  else{
    if(hiku >= kakeru){
      printf("%d",hiku);
    }
    else{
      printf("%d",kakeru);
    }
  }

  return 0;
  
}