diff --git a/FCS/.vscode/launch.json b/FCS/.vscode/launch.json
deleted file mode 100644
index bf64779..0000000
--- a/FCS/.vscode/launch.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": ".NET Core Launch (console)",
-            "type": "coreclr",
-            "request": "launch",
-            "preLaunchTask": "build",
-            "program": "${workspaceFolder}/bin/Debug/netcoreapp2.0/FCS.dll",
-            "args": [],
-            "cwd": "${workspaceFolder}",
-            "console": "integratedTerminal",
-            "stopAtEntry": false,
-            "internalConsoleOptions": "openOnSessionStart"
-        },
-        {
-            "name": ".NET Core Attach",
-            "type": "coreclr",
-            "request": "attach",
-            "processId": "${command:pickProcess}"
-        }
-    ]
-}
\ No newline at end of file
diff --git a/FCS/.vscode/tasks.json b/FCS/.vscode/tasks.json
deleted file mode 100644
index 3189e13..0000000
--- a/FCS/.vscode/tasks.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-    "version": "2.0.0",
-    "tasks": [
-        {
-            "label": "build",
-            "command": "dotnet",
-            "type": "process",
-            "args": [
-                "build",
-                "${workspaceFolder}/FCS.csproj"
-            ],
-            "problemMatcher": "$msCompile"
-        }
-    ]
-}
\ No newline at end of file
diff --git a/FCS/FCS.csproj b/FCS/FCS.csproj
deleted file mode 100644
index 8e047a0..0000000
--- a/FCS/FCS.csproj
+++ /dev/null
@@ -1,8 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
-  </PropertyGroup>
-
-</Project>
diff --git a/FCS/Program.cs b/FCS/Program.cs
deleted file mode 100644
index 8cb3ff8..0000000
--- a/FCS/Program.cs
+++ /dev/null
@@ -1,89 +0,0 @@
-using System;
-using System.Text;
-using System.Linq;
-namespace FCS
-{
-    class Program
-    {
-        static StringBuilder encoded=new StringBuilder();
-        static void Main(string[] args)
-        {
-            while(true)
-            {
-                Console.Clear();
-                Console.WriteLine("1. Zakoduj wiadomosc");
-                Console.WriteLine("2. Odkoduj wiadomosc");
-                Console.WriteLine("3. Wyjscie");
-                int choice=0;
-                if(!int.TryParse(Console.ReadLine(),out choice))
-                    Console.WriteLine("Nieprawidlowe dane");
-                else{
-                    Console.Clear();
-                    if(choice==1)
-                    {
-                        Console.WriteLine("Podaj wiadomosc do zaszyfrowania.");
-                        string input =Console.ReadLine();
-                        byte[] bytes = BitConverter.GetBytes(EncodeCRT(input));
-                        Encoding.ASCII.GetBytes(input).ToList().ForEach(x=>{Console.Write(x+" ");});
-                        foreach(byte b in bytes)
-                            Console.Write(b+" ");
-                        Console.WriteLine();
-                    }
-                    if(choice==2)
-                    {
-                        Console.WriteLine("Podaj wiadomosc do odkodowania.(kod ASCII odzielony spacjami wraz z checksum)");
-                        string input=Console.ReadLine();
-                        string[] asciiInput=input.Split(' ');
-                        StringBuilder msg=new StringBuilder();
-                        for(int i=0;i<asciiInput.Length-2;i++)
-                        {
-                            msg.Append((char)int.Parse(asciiInput[i]));
-                        }
-                        byte[] bytes = BitConverter.GetBytes(EncodeCRT(msg.ToString()));
-                        bool result=true;
-                        for(int j=0;j<bytes.Length;j++)
-                        {
-                            if(bytes[j]!=int.Parse(asciiInput[j + asciiInput.Length - 2].ToString()))
-                            {
-                                result=false;
-                                break;
-                            }
-                        }
-                        Console.WriteLine(result);
-                    }
-                    if(choice==3)
-                    {
-                        return;
-                    }
-                    Console.WriteLine("Nacisnij dowolny klawisz, aby wrocic do poczatku.");
-                    Console.ReadKey();
-                }
-                
-            }
-        }
-        private static ushort EncodeCRT(string strInput)
-        {
-            ushort data;
-            ushort crc = 0xFFFF; //uzupelniamy 16 bitow jedynkami
-            
-            byte[] bytes = Encoding.ASCII.GetBytes(strInput);
-            for (int j = 0; j < bytes.Length; j++)
-            {
-                crc = (ushort)(crc ^ bytes[j]); // XOR
-                for (int i = 0; i < 8; i++) //obsluga bajta
-                {
-                    if ((crc & 0x0001) == 1)
-                        crc = (ushort)((crc >> 1) ^ 0x8408); //Wykonuje XOR
-                    else
-                        crc >>= 1;
-                }
-            }
-            crc = (ushort)~crc; //negujemy
-            data = crc;
-            crc = (ushort)((crc << 8) ^ (data >> 8 & 0xFF));
-            return crc;
-        }
-
-
-    }
-}
diff --git a/FCS/bin/Debug/netcoreapp2.0/FCS.deps.json b/FCS/bin/Debug/netcoreapp2.0/FCS.deps.json
deleted file mode 100644
index 429d849..0000000
--- a/FCS/bin/Debug/netcoreapp2.0/FCS.deps.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "runtimeTarget": {
-    "name": ".NETCoreApp,Version=v2.0",
-    "signature": "da39a3ee5e6b4b0d3255bfef95601890afd80709"
-  },
-  "compilationOptions": {},
-  "targets": {
-    ".NETCoreApp,Version=v2.0": {
-      "FCS/1.0.0": {
-        "runtime": {
-          "FCS.dll": {}
-        }
-      }
-    }
-  },
-  "libraries": {
-    "FCS/1.0.0": {
-      "type": "project",
-      "serviceable": false,
-      "sha512": ""
-    }
-  }
-}
\ No newline at end of file
diff --git a/FCS/bin/Debug/netcoreapp2.0/FCS.dll b/FCS/bin/Debug/netcoreapp2.0/FCS.dll
deleted file mode 100644
index 434e37f..0000000
Binary files a/FCS/bin/Debug/netcoreapp2.0/FCS.dll and /dev/null differ
diff --git a/FCS/bin/Debug/netcoreapp2.0/FCS.pdb b/FCS/bin/Debug/netcoreapp2.0/FCS.pdb
deleted file mode 100644
index e2e691c..0000000
Binary files a/FCS/bin/Debug/netcoreapp2.0/FCS.pdb and /dev/null differ
diff --git a/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.dev.json b/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.dev.json
deleted file mode 100644
index 89b55cb..0000000
--- a/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.dev.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "runtimeOptions": {
-    "additionalProbingPaths": [
-      "/home/piotrek/.dotnet/store/|arch|/|tfm|",
-      "/home/piotrek/.nuget/packages",
-      "/usr/share/dotnet/sdk/NuGetFallbackFolder"
-    ]
-  }
-}
\ No newline at end of file
diff --git a/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.json b/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.json
deleted file mode 100644
index 7539019..0000000
--- a/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "runtimeOptions": {
-    "tfm": "netcoreapp2.0",
-    "framework": {
-      "name": "Microsoft.NETCore.App",
-      "version": "2.0.0"
-    }
-  }
-}
\ No newline at end of file
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfo.cs b/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfo.cs
deleted file mode 100644
index af1f026..0000000
--- a/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfo.cs
+++ /dev/null
@@ -1,23 +0,0 @@
-//------------------------------------------------------------------------------
-// <auto-generated>
-//     This code was generated by a tool.
-//     Runtime Version:4.0.30319.42000
-//
-//     Changes to this file may cause incorrect behavior and will be lost if
-//     the code is regenerated.
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-using System;
-using System.Reflection;
-
-[assembly: System.Reflection.AssemblyCompanyAttribute("FCS")]
-[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
-[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
-[assembly: System.Reflection.AssemblyProductAttribute("FCS")]
-[assembly: System.Reflection.AssemblyTitleAttribute("FCS")]
-[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
-
-// Generated by the MSBuild WriteCodeFragment class.
-
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfoInputs.cache b/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfoInputs.cache
deleted file mode 100644
index 77bde3a..0000000
--- a/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfoInputs.cache
+++ /dev/null
@@ -1 +0,0 @@
-d6e129d647cae90133ecd69184f8f4e639620de6
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.CoreCompileInputs.cache b/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.CoreCompileInputs.cache
deleted file mode 100644
index ff4be43..0000000
--- a/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.CoreCompileInputs.cache
+++ /dev/null
@@ -1 +0,0 @@
-eb536e9c3e7822d620a07bc1467f8f72562eeca4
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.FileListAbsolute.txt b/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.FileListAbsolute.txt
deleted file mode 100644
index fc2bd69..0000000
--- a/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.FileListAbsolute.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-/home/piotrek/Projects/Studia/C Sharp/FCS/bin/Debug/netcoreapp2.0/FCS.deps.json
-/home/piotrek/Projects/Studia/C Sharp/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.json
-/home/piotrek/Projects/Studia/C Sharp/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.dev.json
-/home/piotrek/Projects/Studia/C Sharp/FCS/bin/Debug/netcoreapp2.0/FCS.dll
-/home/piotrek/Projects/Studia/C Sharp/FCS/bin/Debug/netcoreapp2.0/FCS.pdb
-/home/piotrek/Projects/Studia/C Sharp/FCS/obj/Debug/netcoreapp2.0/FCS.csprojAssemblyReference.cache
-/home/piotrek/Projects/Studia/C Sharp/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.CoreCompileInputs.cache
-/home/piotrek/Projects/Studia/C Sharp/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfoInputs.cache
-/home/piotrek/Projects/Studia/C Sharp/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfo.cs
-/home/piotrek/Projects/Studia/C Sharp/FCS/obj/Debug/netcoreapp2.0/FCS.dll
-/home/piotrek/Projects/Studia/C Sharp/FCS/obj/Debug/netcoreapp2.0/FCS.pdb
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/bin/Debug/netcoreapp2.0/FCS.deps.json
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.json
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/bin/Debug/netcoreapp2.0/FCS.runtimeconfig.dev.json
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/bin/Debug/netcoreapp2.0/FCS.dll
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/bin/Debug/netcoreapp2.0/FCS.pdb
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/obj/Debug/netcoreapp2.0/FCS.csprojAssemblyReference.cache
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/obj/Debug/netcoreapp2.0/FCS.csproj.CoreCompileInputs.cache
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfoInputs.cache
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/obj/Debug/netcoreapp2.0/FCS.AssemblyInfo.cs
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/obj/Debug/netcoreapp2.0/FCS.dll
-/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/obj/Debug/netcoreapp2.0/FCS.pdb
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.csprojAssemblyReference.cache b/FCS/obj/Debug/netcoreapp2.0/FCS.csprojAssemblyReference.cache
deleted file mode 100644
index ed1fb63..0000000
Binary files a/FCS/obj/Debug/netcoreapp2.0/FCS.csprojAssemblyReference.cache and /dev/null differ
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.csprojResolveAssemblyReference.cache b/FCS/obj/Debug/netcoreapp2.0/FCS.csprojResolveAssemblyReference.cache
deleted file mode 100644
index 4beda85..0000000
Binary files a/FCS/obj/Debug/netcoreapp2.0/FCS.csprojResolveAssemblyReference.cache and /dev/null differ
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.dll b/FCS/obj/Debug/netcoreapp2.0/FCS.dll
deleted file mode 100644
index 434e37f..0000000
Binary files a/FCS/obj/Debug/netcoreapp2.0/FCS.dll and /dev/null differ
diff --git a/FCS/obj/Debug/netcoreapp2.0/FCS.pdb b/FCS/obj/Debug/netcoreapp2.0/FCS.pdb
deleted file mode 100644
index e2e691c..0000000
Binary files a/FCS/obj/Debug/netcoreapp2.0/FCS.pdb and /dev/null differ
diff --git a/FCS/obj/FCS.csproj.nuget.cache b/FCS/obj/FCS.csproj.nuget.cache
deleted file mode 100644
index 113cec0..0000000
--- a/FCS/obj/FCS.csproj.nuget.cache
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "version": 1,
-  "dgSpecHash": "MruLJ7UwwmFOlfg5rdQcsBRd7Yu01y0m9VtqhmI6ypiOPOcm7AcF0h4MA3XwLshtncwvcbDN9tCkIFSXX5s6KA==",
-  "success": true
-}
\ No newline at end of file
diff --git a/FCS/obj/FCS.csproj.nuget.g.props b/FCS/obj/FCS.csproj.nuget.g.props
deleted file mode 100644
index eba745d..0000000
--- a/FCS/obj/FCS.csproj.nuget.g.props
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8" standalone="no"?>
-<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
-    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
-    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">/home/piotrek/Projects/Studia/C Sharp/Algebra/CRC/DALGLI0/FCS/obj/project.assets.json</ProjectAssetsFile>
-    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">/home/piotrek/.nuget/packages/</NuGetPackageRoot>
-    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">/home/piotrek/.nuget/packages/;/usr/share/dotnet/sdk/NuGetFallbackFolder</NuGetPackageFolders>
-    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
-    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">4.7.0</NuGetToolVersion>
-  </PropertyGroup>
-  <PropertyGroup>
-    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
-  </PropertyGroup>
-  <ImportGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <Import Project="/usr/share/dotnet/sdk/NuGetFallbackFolder/microsoft.netcore.app/2.0.0/build/netcoreapp2.0/Microsoft.NETCore.App.props" Condition="Exists('/usr/share/dotnet/sdk/NuGetFallbackFolder/microsoft.netcore.app/2.0.0/build/netcoreapp2.0/Microsoft.NETCore.App.props')" />
-  </ImportGroup>
-</Project>
\ No newline at end of file
diff --git a/FCS/obj/FCS.csproj.nuget.g.targets b/FCS/obj/FCS.csproj.nuget.g.targets
deleted file mode 100644
index 5d46006..0000000
--- a/FCS/obj/FCS.csproj.nuget.g.targets
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8" standalone="no"?>
-<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
-    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
-  </PropertyGroup>
-  <ImportGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <Import Project="/usr/share/dotnet/sdk/NuGetFallbackFolder/netstandard.library/2.0.0/build/netstandard2.0/NETStandard.Library.targets" Condition="Exists('/usr/share/dotnet/sdk/NuGetFallbackFolder/netstandard.library/2.0.0/build/netstandard2.0/NETStandard.Library.targets')" />
-    <Import Project="/usr/share/dotnet/sdk/NuGetFallbackFolder/microsoft.netcore.app/2.0.0/build/netcoreapp2.0/Microsoft.NETCore.App.targets" Condition="Exists('/usr/share/dotnet/sdk/NuGetFallbackFolder/microsoft.netcore.app/2.0.0/build/netcoreapp2.0/Microsoft.NETCore.App.targets')" />
-  </ImportGroup>
-</Project>
\ No newline at end of file
diff --git a/FCS/obj/project.assets.json b/FCS/obj/project.assets.json
deleted file mode 100644
index 3b786db..0000000
--- a/FCS/obj/project.assets.json
+++ /dev/null
@@ -1,719 +0,0 @@
-{
-  "version": 3,
-  "targets": {
-    ".NETCoreApp,Version=v2.0": {
-      "Microsoft.NETCore.App/2.0.0": {
-        "type": "package",
-        "dependencies": {
-          "Microsoft.NETCore.DotNetHostPolicy": "2.0.0",
-          "Microsoft.NETCore.Platforms": "2.0.0",
-          "NETStandard.Library": "2.0.0"
-        },
-        "compile": {
-          "ref/netcoreapp2.0/Microsoft.CSharp.dll": {},
-          "ref/netcoreapp2.0/Microsoft.VisualBasic.dll": {},
-          "ref/netcoreapp2.0/Microsoft.Win32.Primitives.dll": {},
-          "ref/netcoreapp2.0/System.AppContext.dll": {},
-          "ref/netcoreapp2.0/System.Buffers.dll": {},
-          "ref/netcoreapp2.0/System.Collections.Concurrent.dll": {},
-          "ref/netcoreapp2.0/System.Collections.Immutable.dll": {},
-          "ref/netcoreapp2.0/System.Collections.NonGeneric.dll": {},
-          "ref/netcoreapp2.0/System.Collections.Specialized.dll": {},
-          "ref/netcoreapp2.0/System.Collections.dll": {},
-          "ref/netcoreapp2.0/System.ComponentModel.Annotations.dll": {},
-          "ref/netcoreapp2.0/System.ComponentModel.Composition.dll": {},
-          "ref/netcoreapp2.0/System.ComponentModel.DataAnnotations.dll": {},
-          "ref/netcoreapp2.0/System.ComponentModel.EventBasedAsync.dll": {},
-          "ref/netcoreapp2.0/System.ComponentModel.Primitives.dll": {},
-          "ref/netcoreapp2.0/System.ComponentModel.TypeConverter.dll": {},
-          "ref/netcoreapp2.0/System.ComponentModel.dll": {},
-          "ref/netcoreapp2.0/System.Configuration.dll": {},
-          "ref/netcoreapp2.0/System.Console.dll": {},
-          "ref/netcoreapp2.0/System.Core.dll": {},
-          "ref/netcoreapp2.0/System.Data.Common.dll": {},
-          "ref/netcoreapp2.0/System.Data.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.Contracts.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.Debug.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.DiagnosticSource.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.FileVersionInfo.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.Process.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.StackTrace.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.TextWriterTraceListener.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.Tools.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.TraceSource.dll": {},
-          "ref/netcoreapp2.0/System.Diagnostics.Tracing.dll": {},
-          "ref/netcoreapp2.0/System.Drawing.Primitives.dll": {},
-          "ref/netcoreapp2.0/System.Drawing.dll": {},
-          "ref/netcoreapp2.0/System.Dynamic.Runtime.dll": {},
-          "ref/netcoreapp2.0/System.Globalization.Calendars.dll": {},
-          "ref/netcoreapp2.0/System.Globalization.Extensions.dll": {},
-          "ref/netcoreapp2.0/System.Globalization.dll": {},
-          "ref/netcoreapp2.0/System.IO.Compression.FileSystem.dll": {},
-          "ref/netcoreapp2.0/System.IO.Compression.ZipFile.dll": {},
-          "ref/netcoreapp2.0/System.IO.Compression.dll": {},
-          "ref/netcoreapp2.0/System.IO.FileSystem.DriveInfo.dll": {},
-          "ref/netcoreapp2.0/System.IO.FileSystem.Primitives.dll": {},
-          "ref/netcoreapp2.0/System.IO.FileSystem.Watcher.dll": {},
-          "ref/netcoreapp2.0/System.IO.FileSystem.dll": {},
-          "ref/netcoreapp2.0/System.IO.IsolatedStorage.dll": {},
-          "ref/netcoreapp2.0/System.IO.MemoryMappedFiles.dll": {},
-          "ref/netcoreapp2.0/System.IO.Pipes.dll": {},
-          "ref/netcoreapp2.0/System.IO.UnmanagedMemoryStream.dll": {},
-          "ref/netcoreapp2.0/System.IO.dll": {},
-          "ref/netcoreapp2.0/System.Linq.Expressions.dll": {},
-          "ref/netcoreapp2.0/System.Linq.Parallel.dll": {},
-          "ref/netcoreapp2.0/System.Linq.Queryable.dll": {},
-          "ref/netcoreapp2.0/System.Linq.dll": {},
-          "ref/netcoreapp2.0/System.Net.Http.dll": {},
-          "ref/netcoreapp2.0/System.Net.HttpListener.dll": {},
-          "ref/netcoreapp2.0/System.Net.Mail.dll": {},
-          "ref/netcoreapp2.0/System.Net.NameResolution.dll": {},
-          "ref/netcoreapp2.0/System.Net.NetworkInformation.dll": {},
-          "ref/netcoreapp2.0/System.Net.Ping.dll": {},
-          "ref/netcoreapp2.0/System.Net.Primitives.dll": {},
-          "ref/netcoreapp2.0/System.Net.Requests.dll": {},
-          "ref/netcoreapp2.0/System.Net.Security.dll": {},
-          "ref/netcoreapp2.0/System.Net.ServicePoint.dll": {},
-          "ref/netcoreapp2.0/System.Net.Sockets.dll": {},
-          "ref/netcoreapp2.0/System.Net.WebClient.dll": {},
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\ No newline at end of file
diff --git a/Program.c b/Program.c
new file mode 100644
index 0000000..8d18eed
--- /dev/null
+++ b/Program.c
@@ -0,0 +1,179 @@
+#include <iostream>
+#include <string>
+#include <sstream>
+#include<unistd.h>
+using namespace std;
+
+#define POLY 0x1021
+string t;
+int a,e,c;
+unsigned short EncodeCRT(char *ptr, int count)
+{
+   int  crc;
+   char i;
+   crc = 0xffff;
+   while (--count >= 0)
+   {
+      crc = crc ^ (int) *ptr++ << 8;
+      i = 8;
+      do
+      {
+         if (crc & 0x8000)
+            crc = crc << 1 ^ 0x1021;
+         else
+            crc = crc << 1;
+      } while(--i);
+   }
+   return (crc);
+}
+
+string CheckCrc(string message)
+{
+    string crc="1000000100001";
+    for(int i=0;i<=message.length()-crc.length();)
+    {
+          for(int j=0;j<crc.length();j++)
+            message[i+j]=message[i+j]==crc[j]? '0' : '1';
+          for( ; i<message.length() && message[i]!='1';i++);
+    }
+    for(char i: message.substr(message.length()-crc.length()))
+      if(i!='0')
+      {
+            return "FALSE";
+      }
+    return "TRUE";
+}
+const char* hex_char_to_bin(char c)
+{
+    // TODO handle default / error
+    switch(toupper(c))
+    {
+        case '0': return "0000";
+        case '1': return "0001";
+        case '2': return "0010";
+        case '3': return "0011";
+        case '4': return "0100";
+        case '5': return "0101";
+        case '6': return "0110";
+        case '7': return "0111";
+        case '8': return "1000";
+        case '9': return "1001";
+        case 'A': return "1010";
+        case 'B': return "1011";
+        case 'C': return "1100";
+        case 'D': return "1101";
+        case 'E': return "1110";
+        case 'F': return "1111";
+    }
+}
+
+std::string hexToBin(string &hex)
+{
+    // TODO use a loop from <algorithm> or smth
+    std::string bin;
+    for(unsigned i = 0; i != hex.length(); ++i)
+       bin += hex_char_to_bin(hex[i]);
+    return bin;
+}
+void two(string &in)
+{
+      
+}
+int main()
+{
+            char* input;
+            cout<<("1. Zakoduj wiadomosc");
+                cout<<("2. Odkoduj wiadomosc");
+                cout<<("3. Wyjscie");
+                int choice=0;
+                cin>>choice;
+                cin.ignore();
+                if(choice==1)
+                {
+                    int cc=0;
+                    cout<<("Podaj dlugosc wiadomosci.(ilosc liter ze spacjami wlacznie)");
+                    cin>>cc;
+                    input=new char[cc];
+                    cout<<("Podaj wiadomosc do zaszyfrowania.");
+                    cin.ignore();
+                    cin.getline(input,cc+1);
+                    unsigned short result =EncodeCRT(input,cc);
+                    
+                    for(int i=0;i<cc;i++){
+                        printf("%x",input[i]);
+                        printf(" ");
+                    }
+                    printf("%x",result);
+                    printf("  ");
+                    
+                }
+                    if(choice==2)
+                    {
+
+                         string input3;
+                         cout<<"Podaj wiadomosc do odkodowania w systemie szesnastkowym, bez spacji.";
+                         cin>>input3;
+                          string xd;
+                          std::stringstream ss;
+                        std::string bin;
+                        string hex=input3;
+
+    for(unsigned i = 0; i != hex.length(); ++i)
+       {
+       switch(toupper(hex[i]))
+    {
+        case '0': bin+= "0000"; break;
+        case '1': bin+= "0001"; break;
+        case '2': bin+= "0010"; break;
+        case '3': bin+= "0011"; break;
+        case '4': bin+= "0100";break;
+        case '5': bin+= "0101";break;
+        case '6': bin+= "0110";break;
+        case '7': bin+= "0111";break;
+        case '8': bin+= "1000";break;
+        case '9': bin+= "1001";break;
+        case 'A': bin+= "1010";break;
+        case 'B': bin+= "1011";break;
+        case 'C': bin+= "1100";break;
+        case 'D': bin+= "1101";break;
+        case 'E': bin+= "1110";break;
+        case 'F': bin+= "1111";break;
+    }
+       }
+       
+       string crc="1000000100001";
+       string message=bin;
+       int l=message.length();
+       int cl=crc.length();
+       int ii=0;
+       int k=0;
+      l=message.length();
+    while(true)
+    {
+          if(ii>l-cl) break;
+         for(int j=0;j<cl;j++)
+          {  
+             message[ii+j]=message[ii+j]==crc[j]? '0' : '1';
+          }
+         while(ii<l && message[ii]!='1')
+         {
+               ii++;
+         }
+    }
+    string x=message.substr(message.length()-crc.length());
+    cout<<x;
+    for(char i: x)
+      if(i=='1')
+      {
+            cout<<"FALSE";
+            return 0;
+      }
+      cout<<"TRUE";
+      return 0;
+     }
+                    if(choice==3)
+                    {
+                        return 0;
+                    }
+    return 0;
+}
\ No newline at end of file
diff --git a/README.md.txt b/README.md.txt
index 3c085f5..1341146 100644
--- a/README.md.txt
+++ b/README.md.txt
@@ -1 +1 @@
-Aplikacja konsolowa napisana w jezyku C#. Aby go odpalic potrzebne IDE lub z poziomu konsoli w systemie windows z zainstalowanym .NET Frameworkiem wykonac polecenie: dotnet msbuild - zwroci sciezke skompilowanego pliku exe, ktory mozna odpalic. 
\ No newline at end of file
+Aplikacja konsolowa napisana w jezyku C++. Aby odpalic nalezy skompilowac komenda g++ Program.c. 
diff --git a/a.out b/a.out
new file mode 100755
index 0000000..af44441
Binary files /dev/null and b/a.out differ