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 JavaScript (node.js v5.12) (judge verdict: Wrong Answer)

function Main(input) {
	// 1行目がinput[0], 2行目がinput[1], …に入る
	input=input.split("\n");
	tmp = input[0].split(" ");
	//文字列から10進数に変換するときはparseIntを使います
	var a = parseInt(tmp[0], 10);
	var b = parseInt(tmp[1], 10);
	var add=a+b;
	var sub=a-b;
	var mul=a*b;
	//出力
	var ans=Math.max(add,sub,mul);
	console.log(ans);
}
//*この行以降は編集しないでください（標準入出力から一度に読み込み、Mainを呼び出します）
Main(require("fs").readFileSync("/dev/stdin", "utf8"));