

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 Main {
    public static void main(String[] args) throws IOException { 
        try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
            int[] arr = {0, 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(arr[Integer.parseInt(br.readLine())]);
        }
    }
}