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 9.2.1) (judge verdict: Accepted)

#include<stdio.h>

int max(int a,int b){
  if(a>=b){
    return a;
  }else{
    return b;
  }
}

int amax(int a,int b,int c){
  int q=max(a,b);
  int f=max(q,c);
  return f;
}

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