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: Wrong Answer)

#include <stdio.h>

int main() {
	int A, B;
	
	scanf("%d %d",&A,&B);
	if((A<-1000 || B <-1000) || (A>1000 || B >1000))
	do{
	scanf("%d %d",&A,&B);
	
	}while((A<-1000 || B <-1000) || (A>1000 || B >1000));
	
		if((A+B) > (A-B) && (A+B) > (A*B)){
		printf("%d", (A+B));
		}
		else if((A-B) > (A+B) && (A-B) > (A*B)){
			printf("%d", (A-B));
		}
		else if((A*B) > (A+B) && (A*B) > (A-B)){
			printf("%d", (A*B));
		}
	
	return 0;
}