Factorial

easy

1. You are given a number n.
2. You are required to calculate the factorial of the number. Don't change the signature of factorial function.

Note -&gt; The online judge can't force you to write the function recursively but that is what the spirit of question is.Write recursive and not iterative logic. The purpose of the question is to aid learning recursion and not test you.

Input Format

A number n

Output Format

factorial of n

Constraints

0 &lt;= n &lt;= 10

Notice

Try First, Check Solution later

1. You should first read the question and watch the question video.
2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input

Output

Print Increasing Decreasing

Power-linear