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 Python (3.4.3) (judge verdict: Accepted)

s=input()
S=s.split()
a=0
b=0
c=0
a=int(S[0])+int(S[1])
b=int(S[0])-int(S[1])
c=int(S[0])*int(S[1])
if a>=b and a>=c:
    print(a)
elif b>=a and b>=c:
    print(b)
elif c>=a and c>=b:
    print(c)