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Input

The input contains a single integer a (0 ≤ a ≤ 15).

Output

Output a single integer.

Example

Input


3


Output


13
#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n == 0)
    cout << "15";
  else if (n == 1)
    cout << "14";
  else if (n == 2)
    cout << "12";
  else if (n == 3)
    cout << "13";
  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 == 8)
    cout << "0";
  else if (n == 9)
    cout << "1";
  else if (n == 10)
    cout << "2";
  else if (n == 11)
    cout << "3";
  else if (n == 12)
    cout << "4";
  else if (n == 13)
    cout << "5";
  else if (n == 14)
    cout << "6";
  else if (n == 15)
    cout << "7";
}
