

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 April2017_A {
	public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int x = scan.nextInt();
		//System.out.println((int)Math.pow(x, x));
		//System.out.println((x+x+x)*x);
		int []nums = {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};
		System.out.println(nums[x-1]);
	}
}
