cinemaClubRandom.cs

using System;
using System.IO;

namespace RandSeed {
    class Program {
        static void Main() {
            string seeds, ms, ns;
            int seed, m, n;
            Console.Write("Seed: ");
            seeds = Console.ReadLine();
            Console.Write("Range from 0 until: ");
            ms = Console.ReadLine();
            Console.Write("Amount: ");
            ns = Console.ReadLine();
            if (int.TryParse(seeds, out seed) && int.TryParse(ms, out m) && int.TryParse(ns, out n)) {
                int[] res = GetRandomSet(seed, m, n);
                if (res == null) {
                    throw new Exception("Wrong parameters");
                } else {
                    Console.Write("Output directory: ");
                    string dir = Console.ReadLine();
                    if (Directory.Exists(dir)) {
                        string file;
                        do {
                            file = Path.Combine(dir, Path.GetFileNameWithoutExtension(Path.GetRandomFileName()));
                        } while (File.Exists(file));
                        try {
                            using (StreamWriter sw = File.CreateText(file)) {
                                sw.WriteLine($"#{seed}\t{m}\t{n}");
                                int j = 0;
                                for (int i = 0; i < m; i++) {
                                    if (j != res.Length && res[j] == i) {
                                        sw.WriteLine(1);
                                        j++;
                                    } else {
                                        sw.WriteLine(0);
                                    }
                                }
                            }
                        } catch (Exception e) {
                            throw new Exception(e.Message);
                        }
                        Console.WriteLine($"Successfully wrote to '{file}'");
                    } else {
                        throw new Exception("Folder doesn't exist");
                    }
                }
            } else {
                throw new Exception("Not int parameters");
            }
            Console.ReadKey();
        }

        /// <summary>
        /// Random generator
        /// </summary>
        private static int[] GetRandomSet(int seed, int m, int n) {
            if (m < n || n < 1) {
                return null;
            }
            int[] res = new int[n];
            Random rnd = new Random(seed);
            for (int i = 0; i < n; i++) {
                res[i] = rnd.Next() % (m - i);
            }
            Array.Sort(res);
            for (int i = 1; i < n; i++) {
                if (res[i - 1] >= res[i]) {
                    res[i] = res[i - 1] + 1;
                }
            }
            return res;
        }
    }
}