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>
#include <stdlib.h>

int swap(int *a,int *b){
  *a^=*b;
  *b^=*a;
  *a^=*b;
  return;
}

int main(){
  int A,B;
  int C,D,E;
  scanf("%d %d",&A,&B);
  C=A+B;
  D=A-B;
  E=A*B;
  if(D<E) swap(&D,&E);
  if(C<D) swap(&C,&D);
  printf("%d\n",C);
  return 0;
}