

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::sync_with_stdio(false);
  int arrans[30] = {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},
      n;
  cin >> n;
  cout << arrans[n - 1];
  return 0;
}
