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;
const int MOD = 1000000007;
const int INF = 1000000001;
const long long LINF = 1000000000000000001LL;
int omg[] = {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, 729,
             762, 778, 825, 852, 861, 895, 913, 915, 922, 958, 985, 1086};
int main() {
  ios_base::sync_with_stdio(0);
  int n;
  cin >> n;
  cout << omg[n];
  return 0;
}