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;
int n;
int reverseBits(int x) {
  int reverse = 0;
  for (int i = 0; i < 4; i++) {
    reverse += ((x & (1 << i)) > 0);
    if (i < 3) reverse = reverse << 1;
  }
  return reverse;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cin >> n;
  int rev = reverseBits(n);
  rev--;
  int ans = reverseBits(rev);
  cout << ans << '\n';
}