diff --git a/sequential/linkedlist.hpp b/sequential/linkedlist.hpp
index 5b8775e..330d741 100644
--- a/sequential/linkedlist.hpp
+++ b/sequential/linkedlist.hpp
@@ -26,7 +26,7 @@ private:
 	std::size_t size;
 
 public:
-	void Append(T const value)
+	void Append(T const & value)
 	{
 		if(size == 0)
 		{
@@ -42,7 +42,7 @@ public:
 		++size;
 	}
 
-	void Prepend(T const value)
+	void Prepend(T const & value)
 	{
 		if(size == 0)
 		{
@@ -59,7 +59,7 @@ public:
 		++size;
 	}
 
-	void Insert(T const value, std::size_t const index)
+	void Insert(T const & value, std::size_t const index)
 	{
 		if(index >= size)
 		{
diff --git a/sequential/ringbuffer.hpp b/sequential/ringbuffer.hpp
index 6d835ea..1039042 100644
--- a/sequential/ringbuffer.hpp
+++ b/sequential/ringbuffer.hpp
@@ -31,7 +31,7 @@ private:
 	}
 
 public:
-	void Push(const T value)
+	void Push(T const & value)
 	{
 		data[tail] = value;
 		AdvanceTail();
diff --git a/sequential/stack.hpp b/sequential/stack.hpp
new file mode 100644
index 0000000..073af24
--- /dev/null
+++ b/sequential/stack.hpp
@@ -0,0 +1,46 @@
+#pragma once
+#include "vector.hpp"
+
+template<class T>
+class Stack
+{
+private:
+	Vector<T> data;
+	std::size_t actualSize;
+
+public:
+	void Push(T const & value)
+	{
+		++actualSize;
+		if(actualSize > data.GetSize())
+		{
+			data.Resize(actualSize);
+		}
+
+		data[actualSize - 1ul] = value;
+	}
+
+	T Pop()
+	{
+		if(actualSize == 0ul)
+		{
+			throw std::out_of_range("Cannot pop an empty stack.");
+		}
+		auto const retval = data[actualSize - 1ul];
+		
+		--actualSize;
+		data.Resize(actualSize);
+
+		return retval;
+	}
+
+	std::size_t GetSize() const
+	{
+		return actualSize;
+	}
+
+	Stack()
+		: actualSize(0)
+	{
+	}
+};
\ No newline at end of file
diff --git a/sequential/vector.hpp b/sequential/vector.hpp
index 53015b5..688b1c4 100644
--- a/sequential/vector.hpp
+++ b/sequential/vector.hpp
@@ -12,6 +12,13 @@ private:
 public:
 	void Resize(std::size_t const newSize)
 	{
+		if(newSize == 0ul)
+		{
+			std::free(data);
+			data = nullptr;
+			return;
+		}
+
 		void * result = std::realloc(data, newSize * sizeof(T));
 		if(result == nullptr)
 		{
diff --git a/test/makefile b/test/makefile
index 1b27290..2c039b9 100644
--- a/test/makefile
+++ b/test/makefile
@@ -4,7 +4,7 @@ CFLAGS = -std=c++17 -Wall -g
 CPPS = $(wildcard *.cpp)
 EXES = $(patsubst %.cpp, %.out, $(CPPS))
 
-.PHONY: all clean rebuild
+.PHONY: all clean rebuild check
 
 %.out: %.cpp
 	$(CC) $(CFLAGS) $< -o $@
@@ -15,4 +15,9 @@ clean:
 	-rm *.o
 	-rm *.out
 
-rebuild: clean all
\ No newline at end of file
+rebuild: clean all
+
+EXESQUOTED = $(patsubst %, "%", $(EXES))
+
+check: all
+	./execute-all.sh
\ No newline at end of file
diff --git a/test/stack.cpp b/test/stack.cpp
new file mode 100644
index 0000000..b8a12a2
--- /dev/null
+++ b/test/stack.cpp
@@ -0,0 +1,35 @@
+#include "../sequential/stack.hpp"
+#include "testutil.hpp"
+#include <stack>
+
+bool TestStack()
+{
+	std::size_t testSize = 512ul;
+
+	std::stack<unsigned> truth;
+	Stack<unsigned> stack;
+
+	for(std::size_t i = 0; i < testSize; ++i)
+	{
+		unsigned const toInsert = Util::GetRandomNumber();
+		truth.push(toInsert);
+		stack.Push(toInsert);
+	}
+
+	while(!truth.empty())
+	{
+		if(truth.top() != stack.Pop())
+		{
+			return false;
+		}
+		truth.pop();
+	}
+
+	return true;
+}
+
+int main()
+{
+	Test::Execute(TestStack, "Pop push test");
+	return 0;
+}
\ No newline at end of file