A9570 | Expression

Petya studies in a school and he adores Maths. His class has been studying arithmetic expressions. On the last class the teacher wrote three positive integers $a$ , $b$ , $c$ on the blackboard. The task was to insert signs of operations '+' and '\*', and probably brackets between the numbers so that the value of the resulting expression is as large as possible. Let's consider an example: assume that the teacher wrote numbers 1, 2 and 3 on the blackboard. Here are some ways of placing signs and brackets:

- 1+2\*3=7
- 1\*(2+3)=5
- 1\*2\*3=6
- (1+2)\*3=9

Note that you can insert operation signs only between $a$ and $b$ , and between $b$ and $c$ , that is, you cannot swap integers. For instance, in the given sample you cannot get expression (1+3)\*2.

It's easy to see that the maximum value that you can obtain is 9.

Your task is: given $a$ , $b$ and $c$ print the maximum value that you can get.

The input contains three integers $a$ , $b$ and $c$ , each on a single line ( $1<=a,b,c<=10$ ).

Print the maximum value of the expression that you can obtain.