

Input

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

Output

Output a single integer.

Example

Input

3


Output

27
import java.util.*;

public class NumbersJoke {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int x = scan.nextInt();
        int []y={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.print(y[x-1]);
    }
}
