#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("date.in");
ofstream fout("date.out");

int main()
{
    int n;
    cin >> n;
    if(n%4 == 1 || n%4 == 2)
    {
        cout << 16 << "\n";
    }
    else
    {
        cout << 15 << "\n";
    }
}