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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;
const int k[] = {15, 14, 12, 13, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5, 6, 7};
int n;
void into() { cin >> n; }
void output() { cout << k[n]; }
int main() {
  into();
  output();
  return 0;
}
