

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;
const int MAXN = 1e6 + 100;
const long double Eps = 1e-6;
const int Inf = 1e9 + 1000;
const int Mod = 1e9 + 7;
int a[100] = {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, 729, 762,
              778, 825, 852, 861, 895, 913, 915, 922, 958, 985, 1086};
int32_t main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int now = 2;
  int n;
  cin >> n;
  cout << a[n - 1];
}
