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 Go (1.6) (judge verdict: Runtime Error)

package main

import (
	"os"
	"strconv"
)

func main() {
	a, _ := strconv.Atoi(os.Args[0])
	b, _ := strconv.Atoi(os.Args[1])
	add := a + b
	sub := a - b
	mul := a * b
	ret := add
	if ret < sub {
		ret = sub
		if ret < mul {
			ret = mul
		}
	}
}