diff --git a/exercise.sln b/exercise.sln
new file mode 100644
index 0000000..05b3067
--- /dev/null
+++ b/exercise.sln
@@ -0,0 +1,41 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28010.2050
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "exercise", "exercise\exercise.vcxproj", "{75B1B104-E546-467E-A588-61634BCF80CB}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "test", "test\test.vcxproj", "{8D67B919-8D14-4146-A6DD-6DCA39FC443B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Debug|x64.ActiveCfg = Debug|x64
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Debug|x64.Build.0 = Debug|x64
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Debug|x86.ActiveCfg = Debug|Win32
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Debug|x86.Build.0 = Debug|Win32
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Release|x64.ActiveCfg = Release|x64
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Release|x64.Build.0 = Release|x64
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Release|x86.ActiveCfg = Release|Win32
+		{75B1B104-E546-467E-A588-61634BCF80CB}.Release|x86.Build.0 = Release|Win32
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Debug|x64.ActiveCfg = Debug|x64
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Debug|x64.Build.0 = Debug|x64
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Debug|x86.ActiveCfg = Debug|Win32
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Debug|x86.Build.0 = Debug|Win32
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Release|x64.ActiveCfg = Release|x64
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Release|x64.Build.0 = Release|x64
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Release|x86.ActiveCfg = Release|Win32
+		{8D67B919-8D14-4146-A6DD-6DCA39FC443B}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {FBDE9BFE-4D82-4425-8527-F91DC4CC7627}
+	EndGlobalSection
+EndGlobal
diff --git a/exercise/block.cpp b/exercise/block.cpp
new file mode 100644
index 0000000..3a69976
--- /dev/null
+++ b/exercise/block.cpp
@@ -0,0 +1,152 @@
+#include "pch.h"
+#include "block.h"
+
+class block_type
+{
+public:
+	static const int identity = 1;
+	static const int addition = 2;
+	static const int multiplication = 3;
+	static const int power = 4;
+	static const int limit = 5;
+	static const int condition = 6;
+};
+
+block::~block()
+{
+}
+
+void block::input(double input)
+{
+	in = input;
+}
+
+std::ostream& operator<<(std::ostream& os, const block& block)
+{
+	block.print(os);
+	return os;
+}
+
+void identity::print(std::ostream& os) const
+{
+	os << block_type::identity << " ";
+}
+
+double identity::output () const
+{
+	return in;
+}
+
+void addition::print(std::ostream& os) const
+{
+	os << block_type::addition << " " << constant << " ";
+}
+
+double addition::output() const
+{
+	return in + constant;
+}
+
+void multiplication::print(std::ostream& os) const
+{
+	os << block_type::multiplication << " " << constant << " ";
+}
+
+double multiplication::output() const
+{
+	return in * constant;
+}
+
+void power::print(std::ostream& os) const
+{
+	os << block_type::power << " " << constant << " ";
+}
+
+double power::output() const
+{
+	return std::pow(in, constant);
+}
+
+void limit::print(std::ostream& os) const
+{
+	os << block_type::limit << " " << minimum << " " << maximum << " ";
+}
+
+double limit::output() const
+{
+	return std::clamp(in, minimum, maximum);
+}
+
+void condition::print(std::ostream& os) const
+{
+	os << block_type::condition << " " << constant << " ";
+}
+
+double condition::output() const
+{
+	if (in > constant)
+	{
+		return 1;
+	}
+	else if (in < constant)
+	{
+		return -1;
+	}
+	else
+	{
+		return 0;
+	}
+}
+
+std::unique_ptr<block> create_block(int type, std::istream& stream)
+{
+	switch (type)
+	{
+	case block_type::identity:
+	{
+		return std::make_unique<identity>();
+	}
+	case block_type::addition:
+	{
+		double constant;
+		if (stream >> constant)
+		{
+			return std::make_unique<addition>(constant);
+		}
+	}
+	case block_type::multiplication:
+	{
+		double constant;
+		if (stream >> constant)
+		{
+			return std::make_unique<multiplication>(constant);
+		}
+	}
+	case block_type::power:
+	{
+		double constant;
+		if (stream >> constant)
+		{
+			return std::make_unique<power>(constant);
+		}
+	}
+	case block_type::limit:
+	{
+		double min, max;
+		if (stream >> min >> max)
+		{
+			return std::make_unique<limit>(min, max);
+		}
+	}
+	case block_type::condition:
+	{
+		double constant;
+		if (stream >> constant)
+		{
+			return std::make_unique<condition>(constant);
+		}
+	}
+	default:
+		return nullptr;
+	}
+}
diff --git a/exercise/block.h b/exercise/block.h
new file mode 100644
index 0000000..cef742e
--- /dev/null
+++ b/exercise/block.h
@@ -0,0 +1,87 @@
+#pragma once
+
+class block
+{
+protected:
+	double in;
+	virtual void print(std::ostream& os) const = 0;
+public:
+	block() : in(0.){}
+	void input(double input);
+	virtual double output() const = 0;
+	virtual ~block() = 0;
+	friend std::ostream& operator<<(std::ostream& os, const block& block);
+};
+
+class block_with_constant : public block
+{
+protected:
+	double constant;
+public:
+	block_with_constant(double constant = 0) : constant(constant) {}
+};
+
+// returns input
+class identity : public block
+{
+protected:
+	void print(std::ostream& os) const override;
+public:
+	double output() const override;
+};
+
+// returns input + constant
+class addition : public block_with_constant
+{
+protected:
+	void print(std::ostream& os) const override;
+public: 
+	addition(double constant = 0) : block_with_constant(constant) {}
+	double output() const override;
+};
+
+// returns input * constant
+class multiplication : public block_with_constant
+{
+protected:
+	void print(std::ostream& os) const override;
+public:
+	multiplication(double constant = 0) : block_with_constant(constant) {}
+	double output() const override;
+};
+
+// returns pow(input, constant)
+class power : public block_with_constant
+{
+protected:
+	void print(std::ostream& os) const override;
+public:
+	power(double constant = 0) : block_with_constant(constant) {}
+	double output() const override;
+};
+
+// returns input constrained by min and max
+class limit : public block
+{
+private:
+	double minimum;
+	double maximum;
+protected:
+	void print(std::ostream& os) const override;
+public:
+	limit(double minimum = 0, double maximum = 0) : minimum(minimum), maximum(maximum) {}
+	double output() const override;
+};
+
+// returns -1, 0, 1 based on comparison with constant
+class condition : public block_with_constant
+{
+protected:
+	void print(std::ostream& os) const override;
+public:
+	condition(double constant = 0) : block_with_constant(constant) {}
+	double output() const override;
+};
+
+// factory function
+std::unique_ptr<block> create_block(int type, std::istream& stream);
diff --git a/exercise/command.cpp b/exercise/command.cpp
new file mode 100644
index 0000000..f838001
--- /dev/null
+++ b/exercise/command.cpp
@@ -0,0 +1,183 @@
+#include "pch.h"
+#include "command.h"
+#include "sequence.h"
+
+command::~command()
+{
+}
+
+bool help::execute() const
+{
+	std::cout
+		<< "Sequence Help" << std::endl
+		<< "Commands:" << std::endl
+		<< "exercise --help" << std::endl
+		<< "exercise --add <block type> <block parameters>" << std::endl
+		<< "exercise --remove <block index>" << std::endl
+		<< "exercise --front <block index>" << std::endl
+		<< "exercise --print" << std::endl
+		<< "exercise --eval <value>" << std::endl
+		<< "exercise --eval <input file> <output file>" << std::endl;
+	return true;
+}
+
+const std::string file_name = "local.txt";
+
+bool add_block::execute() const
+{
+	sequence s(file_name);
+	return s.add(type, parameters);
+}
+
+bool remove_block::execute() const
+{
+	sequence s(file_name);
+	return s.remove(index);
+}
+
+bool front_block::execute() const
+{
+	sequence s(file_name);
+	return s.front(index);
+}
+
+bool print_seq::execute() const
+{
+	sequence s(file_name);
+	return s.print(std::cout);
+}
+
+bool eval_value::execute() const
+{
+	sequence s(file_name);
+	return s.eval(value, std::cout);
+}
+
+bool eval_file::execute() const
+{
+	std::ifstream in(input);
+	std::ofstream out(output);
+
+	sequence s(file_name);
+	return s.eval(in, out);
+}
+
+std::optional<int> parse_int(const std::string& s)
+{
+	try
+	{
+		return std::stoi(s);
+	}
+	catch (...)
+	{
+		return std::nullopt;
+	}
+}
+
+std::optional<double> parse_double(const std::string& s)
+{
+	try
+	{
+		return std::stod(s);
+	}
+	catch (...)
+	{
+		return std::nullopt;
+	}
+}
+
+std::unique_ptr<command> create_add_block(int argc, char* argv[])
+{
+	// get type
+	const std::string type_s(argv[2]);
+	std::optional<int> type = parse_int(type_s);
+	if(!type.has_value())
+	{
+		return nullptr;
+	}
+
+	// get parameters
+	std::string parameters;
+	for (int i = 3; i < argc; i++)
+	{
+		parameters.append(" ");
+		parameters.append(argv[i]);
+	}
+
+	return std::make_unique<add_block>(type.value(), parameters);
+}
+
+std::unique_ptr<command> create_remove_block(char* argv[])
+{
+	// get index
+	const std::string index_s(argv[2]);
+	std::optional<int> index = parse_int(index_s);
+	return index.has_value() ? std::make_unique<remove_block>(index.value()) : nullptr;
+}
+
+std::unique_ptr<command> create_front_block(char* argv[])
+{
+	// get index
+	const std::string index_s(argv[2]);
+	std::optional<int> index = parse_int(index_s);
+	return index.has_value() ? std::make_unique<front_block>(index.value()) : nullptr;
+}
+
+std::unique_ptr<command> create_eval_value(char* argv[])
+{
+	// get value
+	const std::string value_s(argv[2]);
+	std::optional<double> value = parse_double(value_s);
+	return value.has_value() ? std::make_unique<eval_value>(value.value()) : nullptr;
+}
+
+std::unique_ptr<command> create_eval_file(char* argv[])
+{
+	// get file paths
+	std::string input(argv[2]);
+	std::string output(argv[3]);
+
+	return std::make_unique<eval_file>(input, output);
+}
+
+std::unique_ptr<command> create_command(int argc, char* argv[])
+{
+	if (argc < 2)
+	{
+		return nullptr;
+	}
+
+	std::string command(argv[1]);
+	if (argc == 2 && command.compare("--help") == 0)
+	{
+		return std::make_unique<help>();
+	}
+	else if (argc >= 3 && command.compare("--add") == 0)
+	{
+		return create_add_block(argc, argv);
+	}
+	else if (argc == 3 && command.compare("--remove") == 0)
+	{
+		return create_remove_block(argv);
+	}
+	else if (argc == 3 && command.compare("--front") == 0)
+	{
+		return create_front_block(argv);
+	}
+	else if (argc == 2 && command.compare("--print") == 0)
+	{
+		return std::make_unique<print_seq>();
+	}
+	else if (argc == 3 && command.compare("--eval") == 0)
+	{
+		return create_eval_value(argv);
+	}
+	else if (argc == 4 && command.compare("--eval") == 0)
+	{
+		return create_eval_file(argv);
+	}
+	else
+	{
+		return nullptr;
+	}
+}
diff --git a/exercise/command.h b/exercise/command.h
new file mode 100644
index 0000000..1196fee
--- /dev/null
+++ b/exercise/command.h
@@ -0,0 +1,70 @@
+#pragma once
+
+class command
+{
+public:
+	virtual bool execute() const = 0;
+	virtual ~command() = 0;
+};
+
+class help : public command
+{
+public:
+	bool execute() const override;
+};
+
+class add_block : public command
+{
+private:
+	int type;
+	std::string parameters;
+public:
+	add_block(int type, std::string parameters) : type(type), parameters(parameters) {};
+	bool execute() const override;
+};
+
+class remove_block : public command
+{
+private: 
+	int index;
+public:
+	remove_block(int index) : index(index) {};
+	bool execute() const override;
+};
+
+class front_block : public command
+{
+private:
+	int index;
+public:
+	front_block(int index) : index(index) {};
+	bool execute() const override;
+};
+
+class print_seq : public command
+{
+public:
+	bool execute() const override;
+};
+
+class eval_value : public command
+{
+private:
+	double value;
+public:
+	eval_value(double value) : value(value) {};
+	bool execute() const override;
+};
+
+class eval_file : public command
+{
+private:
+	std::string input;
+	std::string output;
+public:
+	eval_file(std::string input, std::string output) : input(input), output(output) {};
+	bool execute() const override;
+};
+
+std::unique_ptr<command> create_command(int argc, char* argv[]);
+
diff --git a/exercise/exercise.cpp b/exercise/exercise.cpp
new file mode 100644
index 0000000..d110b80
Binary files /dev/null and b/exercise/exercise.cpp differ
diff --git a/exercise/exercise.vcxproj b/exercise/exercise.vcxproj
new file mode 100644
index 0000000..5c3cb23
--- /dev/null
+++ b/exercise/exercise.vcxproj
@@ -0,0 +1,178 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{75B1B104-E546-467E-A588-61634BCF80CB}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>exercise</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0.17134.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="block.h" />
+    <ClInclude Include="command.h" />
+    <ClInclude Include="pch.h" />
+    <ClInclude Include="sequence.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="block.cpp" />
+    <ClCompile Include="command.cpp" />
+    <ClCompile Include="exercise.cpp" />
+    <ClCompile Include="pch.cpp">
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Create</PrecompiledHeader>
+    </ClCompile>
+    <ClCompile Include="sequence.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/exercise/exercise.vcxproj.filters b/exercise/exercise.vcxproj.filters
new file mode 100644
index 0000000..b76f1f2
--- /dev/null
+++ b/exercise/exercise.vcxproj.filters
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="pch.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="block.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="command.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="sequence.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="pch.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="exercise.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="block.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="command.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="sequence.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/exercise/pch.cpp b/exercise/pch.cpp
new file mode 100644
index 0000000..a38f8a3
Binary files /dev/null and b/exercise/pch.cpp differ
diff --git a/exercise/pch.h b/exercise/pch.h
new file mode 100644
index 0000000..9f45857
Binary files /dev/null and b/exercise/pch.h differ
diff --git a/exercise/sequence.cpp b/exercise/sequence.cpp
new file mode 100644
index 0000000..384f99c
--- /dev/null
+++ b/exercise/sequence.cpp
@@ -0,0 +1,125 @@
+#include "pch.h"
+#include "sequence.h"
+
+sequence::sequence(std::string file) : file(file)
+{
+	std::ifstream fs(file);
+	
+	int type;
+	while(fs >> type)
+	{
+		blocks.push_back(create_block(type, fs));
+	}
+}
+
+sequence::~sequence()
+{
+	std::ofstream fs(file);
+	for (auto it = blocks.begin(); it != blocks.end(); ++it)
+	{
+		fs << **it;
+	}
+}
+
+bool sequence::add(int type, const std::string& parameters)
+{
+	bool result = false;
+
+	std::stringstream ss(parameters);
+	std::unique_ptr<block> block = create_block(type, ss);
+	if (block != nullptr)
+	{
+		blocks.push_back(std::move(block));
+		result = true;
+	}
+
+	return result;
+}
+
+bool sequence::check_index(size_t index) const
+{
+	return 0 <= index && index <= blocks.size() - 1;
+}
+
+bool sequence::remove(size_t index)
+{
+	bool result = false;
+
+	if (check_index(index))
+	{
+		auto it = blocks.begin();
+		std::advance(it, index);
+		blocks.erase(it);
+		result = true;
+	}
+
+	return result;
+}
+
+bool sequence::front(size_t index)
+{
+	bool result = false;
+
+	if (check_index(index))
+	{
+		auto it = blocks.begin();
+		std::advance(it, index);
+		std::unique_ptr<block> block = std::move(*it);
+		blocks.erase(it);
+		blocks.insert(blocks.begin(), std::move(block));
+		result = true;
+	}
+
+	return result;
+}
+
+bool sequence::print(std::ostream& os) const
+{
+	for (auto it = blocks.begin(); it != blocks.end(); ++it)
+	{
+		os << **it;
+	}
+
+	return true;
+}
+
+double sequence::eval_impl(double input) const
+{
+	double result = input;
+	for (auto it = blocks.begin(); it != blocks.end(); ++it)
+	{
+		(*it)->input(result);
+		result = (*it)->output();
+	}
+	return result;
+}
+
+bool sequence::eval(double value, std::ostream& os) const
+{
+	bool result = false;
+
+	if (blocks.size() > 0)
+	{
+		os << eval_impl(value);
+		result = true;
+	}
+	
+	return result;
+}
+
+bool sequence::eval(std::istream& is, std::ostream& os) const
+{
+	bool result = false;
+
+	if (blocks.size() > 0)
+	{
+		double value;
+		while (is >> value) 
+		{
+			os << eval_impl(value) << " ";
+		}
+		result = true;
+	}
+
+	return result;
+}
\ No newline at end of file
diff --git a/exercise/sequence.h b/exercise/sequence.h
new file mode 100644
index 0000000..073e5ae
--- /dev/null
+++ b/exercise/sequence.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include "block.h"
+
+class sequence
+{
+private:
+	std::string file;
+	std::vector <std::unique_ptr<block>> blocks;
+	bool check_index(size_t index) const;
+	double eval_impl(double) const;
+public:
+	sequence(std::string file);
+	~sequence();
+	bool add(int type, const std::string& parameters);
+	bool remove(size_t index);
+	bool front(size_t index);
+	bool print(std::ostream& os) const;
+	bool eval(double value, std::ostream& os) const;
+	bool eval(std::istream& is, std::ostream& os) const;
+};
diff --git a/test/block_test.cpp b/test/block_test.cpp
new file mode 100644
index 0000000..6e75358
--- /dev/null
+++ b/test/block_test.cpp
@@ -0,0 +1,202 @@
+#include "stdafx.h"
+#include "../exercise/block.h"
+
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace test
+{		
+	TEST_CLASS(block_test)
+	{
+	public:
+		TEST_METHOD(identity_output)
+		{
+			identity block;
+			block.input(4.5);
+			double out = block.output();
+			Assert::AreEqual(4.5, out);
+		}
+		TEST_METHOD(addition_output)
+		{
+			addition block(4.5);
+			block.input(1);
+			double out = block.output();
+			Assert::AreEqual(5.5, out);
+		}
+		TEST_METHOD(multiplication_output)
+		{
+			multiplication block(3.5);
+			block.input(2);
+			double out = block.output();
+			Assert::AreEqual(7.0, out);
+		}
+		TEST_METHOD(power_output)
+		{
+			power block(3.0);
+			block.input(2);
+			double out = block.output();
+			Assert::AreEqual(8.0, out);
+		}
+		TEST_METHOD(limit_output_bellow_range)
+		{
+			limit block(3.5, 8.7);
+			block.input(2);
+			double out = block.output();
+			Assert::AreEqual(3.5, out);
+		}
+		TEST_METHOD(limit_output_in_range)
+		{
+			limit block(3.5, 8.7);
+			block.input(5.5);
+			double out = block.output();
+			Assert::AreEqual(5.5, out);
+		}
+		TEST_METHOD(limit_output_above_range)
+		{
+			limit block(3.5, 8.7);
+			block.input(9.3);
+			double out = block.output();
+			Assert::AreEqual(8.7, out);
+		}
+		TEST_METHOD(condition_output_bellow_limit)
+		{
+			condition block(5.0);
+			block.input(2);
+			double out = block.output();
+			Assert::AreEqual(-1.0, out);
+		}
+		TEST_METHOD(condition_output_at_limit)
+		{
+			condition block(5.0);
+			block.input(5);
+			double out = block.output();
+			Assert::AreEqual(0.0, out);
+		}
+		TEST_METHOD(condition_output_above_limit)
+		{
+			condition block(5.0);
+			block.input(7);
+			double out = block.output();
+			Assert::AreEqual(1.0, out);
+		}
+		TEST_METHOD(print_identity)
+		{
+			std::stringstream ss;
+			identity block;
+			ss << block;
+			Assert::AreEqual(0, ss.str().compare("1 "));
+		}
+		TEST_METHOD(print_addition)
+		{
+			std::stringstream ss;
+			addition block(4.5);
+			ss << block;
+			Assert::AreEqual(0, ss.str().compare("2 4.5 "));
+		}
+		TEST_METHOD(print_multiplication)
+		{
+			std::stringstream ss;
+			multiplication block(3.5);
+			ss << block;
+			Assert::AreEqual(0, ss.str().compare("3 3.5 "));
+		}
+		TEST_METHOD(print_power)
+		{
+			std::stringstream ss;
+			power block(3.0);
+			ss << block;
+			Assert::AreEqual(0, ss.str().compare("4 3 "));
+		}
+		TEST_METHOD(print_limit)
+		{
+			std::stringstream ss;
+			limit block(3.5, 8.7);
+			ss << block;
+			Assert::AreEqual(0, ss.str().compare("5 3.5 8.7 "));
+		}
+		TEST_METHOD(print_condition)
+		{
+			std::stringstream ss;
+			condition block(5.0);
+			ss << block;
+			Assert::AreEqual(0, ss.str().compare("6 5 "));
+		}
+		TEST_METHOD(create_non_existing_block)
+		{
+			std::stringstream ss;
+			std::unique_ptr<block> block = create_block(100, ss);
+			Assert::IsTrue(nullptr == block);
+		}
+		TEST_METHOD(create_identity)
+		{
+			std::stringstream ss;
+			std::unique_ptr<block> block = create_block(1, ss);
+			Assert::IsTrue(nullptr != block);
+			Assert::IsTrue(std::type_index(typeid(*block)) == std::type_index(typeid(identity)));
+		}
+		TEST_METHOD(create_addition_from_valid_parameters)
+		{
+			std::stringstream ss("4");
+			std::unique_ptr<block> block = create_block(2, ss);
+			Assert::IsTrue(nullptr != block);
+			Assert::IsTrue(std::type_index(typeid(*block)) == std::type_index(typeid(addition)));
+		}
+		TEST_METHOD(create_addition_from_invalid_parameters)
+		{
+			std::stringstream ss;
+			std::unique_ptr<block> block = create_block(2, ss);
+			Assert::IsTrue(nullptr == block);
+		}
+		TEST_METHOD(create_multiplication_from_valid_parameters)
+		{
+			std::stringstream ss("4");
+			std::unique_ptr<block> block = create_block(3, ss);
+			Assert::IsTrue(nullptr != block);
+			Assert::IsTrue(std::type_index(typeid(*block)) == std::type_index(typeid(multiplication)));
+		}
+		TEST_METHOD(create_multiplication_from_invalid_parameters)
+		{
+			std::stringstream ss;
+			std::unique_ptr<block> block = create_block(3, ss);
+			Assert::IsTrue(nullptr == block);
+		}
+		TEST_METHOD(create_power_from_valid_parameters)
+		{
+			std::stringstream ss("4");
+			std::unique_ptr<block> block = create_block(4, ss);
+			Assert::IsTrue(nullptr != block);
+			Assert::IsTrue(std::type_index(typeid(*block)) == std::type_index(typeid(power)));
+		}
+		TEST_METHOD(create_power_from_invalid_parameters)
+		{
+			std::stringstream ss;
+			std::unique_ptr<block> block = create_block(4, ss);
+			Assert::IsTrue(nullptr == block);
+		}
+		TEST_METHOD(create_limit_from_valid_parameters)
+		{
+			std::stringstream ss("4 6");
+			std::unique_ptr<block> block = create_block(5, ss);
+			Assert::IsTrue(nullptr != block);
+			Assert::IsTrue(std::type_index(typeid(*block)) == std::type_index(typeid(limit)));
+		}
+		TEST_METHOD(create_limit_from_invalid_parameters)
+		{
+			std::stringstream ss;
+			std::unique_ptr<block> block = create_block(5, ss);
+			Assert::IsTrue(nullptr == block);
+		}
+		TEST_METHOD(create_condition_from_valid_parameters)
+		{
+			std::stringstream ss("4");
+			std::unique_ptr<block> block = create_block(6, ss);
+			Assert::IsTrue(nullptr != block);
+			Assert::IsTrue(std::type_index(typeid(*block)) == std::type_index(typeid(condition)));
+		}
+		TEST_METHOD(create_condition_from_invalid_parameters)
+		{
+			std::stringstream ss;
+			std::unique_ptr<block> block = create_block(6, ss);
+			Assert::IsTrue(nullptr == block);
+		}
+	};
+}
\ No newline at end of file
diff --git a/test/sequence_test.cpp b/test/sequence_test.cpp
new file mode 100644
index 0000000..7c6f4b4
--- /dev/null
+++ b/test/sequence_test.cpp
@@ -0,0 +1,84 @@
+#include "stdafx.h"
+#include "../exercise/sequence.h"
+
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace test
+{
+	const std::string file_name = "test.txt";
+
+	TEST_CLASS(sequnece_test)
+	{
+	public:
+		TEST_METHOD_CLEANUP(remove_sequence_file)
+		{
+			std::remove(file_name.c_str());
+		}
+		TEST_METHOD(add_block)
+		{
+			sequence s(file_name);
+			s.add(1, "");
+			s.add(2, "2.5");
+			s.add(3, "3.5");
+			s.add(4, "2");
+			s.add(5, "-3.5 8.4");
+			s.add(6, "5.5");
+
+			std::stringstream ss;
+			s.print(ss);
+
+			Assert::AreEqual(0, ss.str().compare("1 2 2.5 3 3.5 4 2 5 -3.5 8.4 6 5.5 "));
+		}
+		TEST_METHOD(remove_block)
+		{
+			sequence s(file_name);
+			s.add(1, "");
+			s.add(2, "2.5");
+			s.add(3, "3.5");
+			s.remove(0);
+
+			std::stringstream ss;
+			s.print(ss);
+
+			Assert::AreEqual(0, ss.str().compare("2 2.5 3 3.5 "));
+		}
+		TEST_METHOD(front_block)
+		{
+			sequence s(file_name);
+			s.add(1, "");
+			s.add(2, "2.5");
+			s.add(3, "3.5");
+			s.front(2);
+
+			std::stringstream ss;
+			s.print(ss);
+
+			Assert::AreEqual(0, ss.str().compare("3 3.5 1 2 2.5 "));
+		}
+		TEST_METHOD(eval_value)
+		{
+			sequence s(file_name);
+			s.add(1, "");
+			s.add(2, "2.5");
+			s.add(3, "3.5");
+			
+			std::stringstream ss;
+			s.eval(3.5, ss);
+
+			Assert::AreEqual(0, ss.str().compare("21"));
+		}
+		TEST_METHOD(eval_stream)
+		{
+			sequence s(file_name);
+			s.add(1, "");
+			s.add(2, "2.5");
+			s.add(3, "3.5");
+
+			std::stringstream input("1.0 2.3 4.5 7.9");
+			std::stringstream output;
+			s.eval(input, output);
+
+			Assert::AreEqual(0, output.str().compare("12.25 16.8 24.5 36.4 "));
+		}
+	};
+}
\ No newline at end of file
diff --git a/test/stdafx.cpp b/test/stdafx.cpp
new file mode 100644
index 0000000..ab6cf71
--- /dev/null
+++ b/test/stdafx.cpp
@@ -0,0 +1,8 @@
+// stdafx.cpp : source file that includes just the standard includes
+// test.pch will be the pre-compiled header
+// stdafx.obj will contain the pre-compiled type information
+
+#include "stdafx.h"
+
+// TODO: reference any additional headers you need in STDAFX.H
+// and not in this file
diff --git a/test/stdafx.h b/test/stdafx.h
new file mode 100644
index 0000000..68eb05d
--- /dev/null
+++ b/test/stdafx.h
@@ -0,0 +1,16 @@
+// stdafx.h : include file for standard system include files,
+// or project specific include files that are used frequently, but
+// are changed infrequently
+//
+
+#pragma once
+
+#include "targetver.h"
+
+// Headers for CppUnitTest
+#include "CppUnitTest.h"
+#include <cstdio>
+#include <typeindex>
+#include <vector>
+
+// TODO: reference additional headers your program requires here
diff --git a/test/targetver.h b/test/targetver.h
new file mode 100644
index 0000000..87c0086
--- /dev/null
+++ b/test/targetver.h
@@ -0,0 +1,8 @@
+#pragma once
+
+// Including SDKDDKVer.h defines the highest available Windows platform.
+
+// If you wish to build your application for a previous Windows platform, include WinSDKVer.h and
+// set the _WIN32_WINNT macro to the platform you wish to support before including SDKDDKVer.h.
+
+#include <SDKDDKVer.h>
diff --git a/test/test.vcxproj b/test/test.vcxproj
new file mode 100644
index 0000000..1bcc276
--- /dev/null
+++ b/test/test.vcxproj
@@ -0,0 +1,188 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{8D67B919-8D14-4146-A6DD-6DCA39FC443B}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>test</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0.17763.0</WindowsTargetPlatformVersion>
+    <ProjectSubType>NativeUnitTestProject</ProjectSubType>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <UseOfMfc>false</UseOfMfc>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+    <UseOfMfc>false</UseOfMfc>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <UseOfMfc>false</UseOfMfc>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+    <UseOfMfc>false</UseOfMfc>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(ProjectDir)$(Configuration)\</OutDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(ProjectDir)$(Platform)\$(Configuration)\</OutDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(ProjectDir)$(Configuration)\</OutDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(ProjectDir)$(Platform)\$(Configuration)\</OutDir>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <UseFullPaths>true</UseFullPaths>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <AdditionalLibraryDirectories>../exercise/$(Configuration);$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>block.obj;command.obj;pch.obj;sequence.obj;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <UseFullPaths>true</UseFullPaths>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <AdditionalLibraryDirectories>../exercise/$(Platform)/$(Configuration);$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>block.obj;command.obj;pch.obj;sequence.obj;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <AdditionalIncludeDirectories>$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <UseFullPaths>true</UseFullPaths>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <AdditionalLibraryDirectories>../exercise/$(Configuration);$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>block.obj;command.obj;pch.obj;sequence.obj;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <AdditionalIncludeDirectories>$(VCInstallDir)UnitTest\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <UseFullPaths>true</UseFullPaths>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <AdditionalLibraryDirectories>../exercise/$(Platform)/$(Configuration);$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>block.obj;command.obj;pch.obj;sequence.obj;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="stdafx.h" />
+    <ClInclude Include="targetver.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="sequence_test.cpp" />
+    <ClCompile Include="stdafx.cpp">
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Create</PrecompiledHeader>
+    </ClCompile>
+    <ClCompile Include="block_test.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\exercise\exercise.vcxproj">
+      <Project>{75b1b104-e546-467e-a588-61634bcf80cb}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/test/test.vcxproj.filters b/test/test.vcxproj.filters
new file mode 100644
index 0000000..79f34d0
--- /dev/null
+++ b/test/test.vcxproj.filters
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="stdafx.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="targetver.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="stdafx.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="block_test.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="sequence_test.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
\ No newline at end of file