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;
  cin >> a;
  if (a == 0) {
    cout << 15;
  } else if (a == 1) {
    cout << 14;
  } else if (a > 3 && a < 8) {
    cout << a + 4;
  } else if (a == 8) {
    cout << 0;
  } else if (a > 8) {
    cout << a - 8;
  } else {
    cout << a + 10;
  }
}