#951. Catalan number Cₙ
Find the **Catalan number Cₙ**.
### Input
One integer n (0 ≤ n ≤ 30).
### Output
Answer.
Examples
Input
22
Output
91482563640
Input
6
Output
132
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.