

Input

The input contains a single integer a (1 ≤ a ≤ 30).

Output

Output a single integer.

Example

Input

3


Output

27
import java.util.Scanner;

public class NumberJoke{
	public static void main(String[]args){

	Scanner scanner=new Scanner(System.in);
	int a=scanner.nextInt();
	int []b={4,22,27,58,85,94,121,166,202,265,274,319,346,355,378,382,391,438,454,483,517,526,535,562,576,588,627,634,636,645,648,654};

	System.out.println(b[a-1]);	
}
}
		
	
