B. Operation
time limit per test
1 second
memory limit per test
64 megabytes
input
standard input
output
standard output

José has just learned the basic arithmetic operations (addition, subtraction, multiplication, and division). Since he is quite good at it, his friend Óscar, who is playing a new video game he bought, asks José for help with his homework. The teacher gives him two positive integers $$$a$$$ and $$$b$$$ and asks him to apply one of the $$$4$$$ mentioned operations to obtain the highest possible result. In other words, he is asked to find the maximum value of $$$a?b$$$, where $$$?$$$ can be addition, subtraction, multiplication, or division.

Input

You are given two integers $$$a$$$ and $$$b$$$. $$$(1 \leq a, b \leq 100)$$$.

Output

You have to print a number, the maximum value after applying an operation to $$$a$$$ and $$$b$$$.

Examples
Input
6 3
Output
18
Input
8 1
Output
9
Note

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Problem idea: Hectorungo18

Problem preparation: Hectorungo18

Ocurrences: Novice 2