using System;

public class Hello
{
    static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        getAns(n);
    }
    static void getAns(int n)
    {
        var count = 0;
        for (int i = 0; i <= n / 5; i++)
            for (int j = 0; j <= i; j++)
                for (int k = 0; k <= n / 3; k++)
                    if (5 * i + 2 * j + 3 * k == n) count++;
        Console.WriteLine(count);
    }
}