

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 A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int[] arr = {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};
        System.err.println(arr.length);
        int funnyJokeXD = sc.nextInt() - 1;
        System.out.println(arr[funnyJokeXD]);
    }
}