

Input

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

Output

Output a single integer.

Example

Input

3


Output

27
import java.io.*;
import java.util.*;

public class NumbersJoke {
	public static void main(String[] args) throws Exception {
		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, 627,634,636,645,648,654,663,666,690,706,728,729, 762,778,825,852,861,895,913,915,922,958,985,1086, 1111,1165};
		Scanner sc = new Scanner(System.in);
		System.out.println(nums[sc.nextInt()-1]);
	}
}