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 main() {
  int a, r;
  cin >> a;
  if (a == 3)
    cout << 13;
  else if (a == 0)
    cout << 15;
  else if (a == 1)
    cout << 14;
  else if (a == 2)
    cout << 12;
  else if (a == 4)
    cout << 8;
  else if (a == 5)
    cout << 9;
  else if (a == 6)
    cout << 10;
  else if (a == 7)
    cout << 11;
  else if (a == 8)
    cout << 0;
  else if (a == 9)
    cout << 1;
  else if (a == 10)
    cout << 2;
  else if (a == 11)
    cout << 3;
  else if (a == 12)
    cout << 4;
  else if (a == 13)
    cout << 5;
  else if (a == 14)
    cout << 6;
  else if (a == 15)
    cout << 7;
  cout << " ";
  return 0;
}