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.

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