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 main() {
  cin >> n;
  if (n == 0)
    cout << "15";
  else if (n == 1)
    cout << "14";
  else if (n == 4)
    cout << "8";
  else if (n == 5)
    cout << "9";
  else if (n == 6)
    cout << "10";
  else if (n == 7)
    cout << "11";
  else if (n == 3)
    cout << "13";
  else if (n == 2)
    cout << "12";
  else
    cout << n - 8 << "\n";
}