using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        long n = NN;
        var ans = 0L;
        for (var p = 2; p <= 20; ++p) for (var a = 0; a < p && a < 10; ++a) for (var b = 0; b < p && b < 10; ++b)
        {
            if (a == b) continue;
            if ((a * p + b) < p * p - 1 && n * (a * p + b) > p * p - 1)
            {
                ++ans;
            }
        }
        for (var a = 0; a < 10; ++a) for (var b = 0; b < 10; ++b)
        {
            if (a == b) continue;
            if (n * (a * 21 + b) <= 21 * 21 - 1) break;
            var ok = 21L;
            var ng = 1_000_000_001L;
            while (ng - ok > 1)
            {
                var mid = (ok + ng) / 2;
                if (n * (a * mid + b) > mid * mid - 1) ok = mid;
                else ng = mid;
            }
            ans += ok - 20;
        }
        WriteLine(ans);
    }
}