CF479A.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.

佩佳在一所学校学习，他非常喜爱数学。他的班级最近正在学习算术表达式。在上一节课中，老师在黑板上写下了三个正整数 $a$、$b$、$c$。任务是在这些数字之间插入加号 '+' 和乘号 '*'，并可选择性地添加括号，使得所得表达式的值尽可能大。我们来看一个例子：假设老师在黑板上写下的数字是 1、2 和 3。以下是一些插入运算符和括号的方式：

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

注意：你只能在 $a$ 与 $b$ 之间、以及 $b$ 与 $c$ 之间插入运算符，即不允许交换整数的位置。例如，在上述样例中，你不可以得到表达式 (1+3)*2。

显然，你能得到的最大值是 9。

你的任务是：给定 $a$、$b$ 和 $c$，输出你能得到的最大值。

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

输入包含三个整数 $a$、$b$ 和 $c$，每行一个（$1 ≤ a, b, c ≤ 10$）。

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

输出你能得到的表达式的最大值。