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;
long long int gcd(long long int a, long long int b) {
  return b == 0 ? a : gcd(b, a % b);
}
long long power(long long a, long long b) {
  if (b < 0) return 0;
  long long ret = 1;
  while (b) {
    if (b % 2 == 1) ret = ret * a;
    a = a * a;
    b /= 2;
  }
  return ret;
}
long long ans[31] = {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};
int main() {
  long long n;
  cin >> n;
  cout << ans[n];
  return 0;
}