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)

// ConsoleApplication1.cpp : アプリケーションのエントリ ポイントを定義します。
//
#include<stdio.h>
int main() {

	int a;
	int b;
	int res = 0;

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

	if (a + b > res) res = a + b;
	if (a - b > res) res = a - b;
	if (a * b > res) res = a * b;

	printf("%d", res);

	return 0;
}