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 INF = 1e9;
const long long INF64 = 1e18;
const int MOD = 1e9 + 7;
const long double EPS = 1e-9;
const long double PI = acosl(-1.0);
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, 852, 861, 895,
             913, 915, 922, 958, 985, 1086, 1111, 1165};
  int n;
  cin >> n;
  n--;
  cout << a[n] << endl;
  return 0;
}