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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.Threading.Tasks;
  6.  
  7. namespace ConsoleApplication10
  8. {
  9.     class Program
  10.     {
  11.         static void Main(string[] args)
  12.         {
  13.             var input = "t";
  14.  
  15.             var ciphertext = encrypt(input);
  16.  
  17.             Console.WriteLine(decrypt(ciphertext));
  18.  
  19.             Console.ReadKey();
  20.         }
  21.  
  22.         public static string encrypt(string input)
  23.         {
  24.             string final;
  25.  
  26.             string date = DateTime.Now.Date.ToString("MMddyyyy");
  27.  
  28.             var datetime = int.Parse(date);
  29.             List<double> semi = new List<double>();
  30.             var bytes = Encoding.UTF8.GetBytes(input);
  31.             for (int i = 0; i < bytes.Length; i++)
  32.             {
  33.                 double y = bytes[i] * datetime / 100000;
  34.                 semi.Add(y);
  35.                 Console.WriteLine(y);
  36.             }
  37.  
  38.             Console.WriteLine(string.Join("", bytes));
  39.  
  40.             final = string.Join(":", semi.ToArray()) + ":" + date;
  41.             return final;
  42.         }
  43.  
  44.  
  45.         public static string decrypt(string input)
  46.         {
  47.             string final;
  48.             string[] raw = input.Split(':');
  49.  
  50.             int date = int.Parse(raw[raw.Length - 1].Replace("/", ""));
  51.             var dump = new List<string>(raw);
  52.  
  53.             dump.RemoveAt(raw.Length - 1);
  54.             string[] stringbytes = dump.ToArray();
  55.  
  56.  
  57.             List<byte> bytes = new List<byte>();
  58.  
  59.             for (int i = 0; i < stringbytes.Length; i++)
  60.             {
  61.                 var x = double.Parse(stringbytes[i]);
  62.                 Console.WriteLine(x);
  63.  
  64.                 x = x * 100000 / date;
  65.                 byte finalbytes = Convert.ToByte(x);
  66.                 bytes.Add(finalbytes);
  67.  
  68.             }
  69.             Console.WriteLine(string.Join("", bytes.ToArray()));
  70.             Console.WriteLine(date);
  71.             var bytearray = bytes.ToArray();
  72.             final = Encoding.UTF8.GetString(bytearray);
  73.  
  74.             return final;
  75.         }
  76.     }
  77. }
  78.  
Success #stdin #stdout 0.1s 24264KB
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stdin
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Standard input is empty
stdout
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7078
116
7078
116
6102016
t
https://ideone.com/Rjc13A
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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