

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() {
  int a[] = {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};
  int n;
  scanf("%d", &n);
  n--;
  cout << a[n];
  return 0;
}
