using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    static string[] SList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => ReadLine()).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var ans = new List<int[]>();
        for (var x = 0; x <= n; ++x) for (var y = 0; y <= n; ++y)
        {
            if (x == 0 && y == 0) continue;
            if (x * y > n) break;
            if ((n - x * y) % (x + y) == 0) ans.Add(new int[] { x, y, (n - x * y) / (x + y) });
        }
        WriteLine(ans.Count);
        WriteLine(string.Join("\n", ans.Select(ai => string.Join(" ", ai))));
    }
}