

Input

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

Output

Output a single integer.

Example

Input

3


Output

27
#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n;
  cin >> n;
  int arr[40] = {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, 663, 666, 690, 706, 728};
  cout << arr[n];
  return 0;
}
