C#-Code

using System;
using System.Collections.Generic;

namespace Aufgabe176
{
    class Program
    {
        static void Main(string[] args)
        {
            List<List<int>> array = new List<List<int>>();
            List<int> pre_array = new List<int>();
            Int32 n;
            while (true)
            {
                try
                {
                    Console.Write("Zahl eingeben: ");
                    string eing = Console.ReadLine();
                    Int32.TryParse(eing, out n);
                    break;
                }
                catch
                {
                    Console.WriteLine("Keine Zahl eingegeben! Bitte nochmal!\n");
                }
            }

            Int32 i = 1;
            Int32 j = 1;
            Int32 k = 0;

            while (true)
            {
                if (i < n)
                {
                    while (i < n)
                    {
                        pre_array.Add(i);
                        i += k + j;
                        k += 1;
                    }
                }
                else if (i == n)
                {
                    pre_array.Add(i);
                    array.Add(pre_array);
                    break;
                }
                else
                {
                    List<int> c_array = new List<int>(pre_array);
                    array.Add(c_array);
                    i = array[j - 1][0] + j + 1;
                    j += 1;
                    k = 0;
                    pre_array.Clear();
                }
            }
            for(int l = 0; l < array.Count; l++)
            {
                if (array[l].Contains(n))
                {
                    Console.WriteLine("ZN = " + l + ", SN = " + array[l].IndexOf(n));
                }
            }
        }
    }
}