using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var x = NN;
        var res = new int[] { 0, 0, 2, 5, 4, 15, 14, 25, 24, 35, 34 };
        WriteLine(res[x]);
    }
}