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 Python (3.4.3) (judge verdict: Accepted)

#!/usr/bin/env python
from collections import defaultdict, deque
import math
from math import factorial
import fractions
import re
import bisect

BIGNUM = 10 ** 9 + 7

def main():
    A, B = map(int, input().split())
    #N = int(input())
    #Hs = list(map(int, input().split()))

    maxnum = max([A+B, A-B, A*B])
    print(maxnum)


if __name__ == '__main__':
    main()