Problem:
Score : 100 points

Problem Statement

We have two integers: A and B.

Print the largest number among A + B, A - B, and A \times B.

Constraints

All values in input are integers.

-100 \leq A,\ B \leq 100

Input

Input is given from Standard Input in the following format:

A B

Output

Print the largest number among A + B, A - B, and A \times B.

Sample Input 1

-13 3

Sample Output 1

-10

The largest number among A + B = -10, A - B = -16, and A \times B = -39 is -10.

Sample Input 2

1 -33

Sample Output 2

34

The largest number among A + B = -32, A - B = 34, and A \times B = -33 is 34.

Sample Input 3

13 3

Sample Output 3

39

The largest number among A + B = 16, A - B = 10, and A \times B = 39 is 39.

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>
int main(void){
  int A;
  int B;
  int P;
  int M;
  int K;
  scanf("%d",&A);
  scanf("%d",&B);
  P=A+B;
  M=A-B;
  K=A*B;
  if((A==0)&&(B==0)){
    printf("0");
  }
  if((A!=0)&&(B!=0)){
    if((A<0)&&(B<0)){
      printf("%d",K);
    }
    if((A<0)&&(B>0)){
      printf("%d",P);
    }
    if((A>0)&&(B<0)){
      printf("%d",M);
    }
    if((A>0)&&(B>0)){
      printf("%d",K);
    }
  }
  }