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: Runtime Error)

n=int(input())
x=input()
s=list(x)
 
list=[]
for i in range(n):
    a=0
    l=s[:i]
    a+=l.count("W")
    k=s[i+1:]
    a+=k.count("E")
    list.append(a)
 
f=min(list)

print(f)