Problem: 

Input

The input contains a single integer a (0 ≤ a ≤ 35).

Output

Output a single integer.

Examples

Input

3


Output

8


Input

10


Output

1024

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
void start() {
  ios_base ::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
}
const long long nmax = (long long)1e5 + 20;
long long joke[35] = {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};
signed main() {
  start();
  long long n;
  cin >> n;
  cout << joke[n] << endl;
  return 0;
}