diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..378eac2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..eedf235
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,38 @@
+cmake_minimum_required(VERSION 3.16)
+project(cmake_exercise)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Find Boost libraries
+find_package(Boost REQUIRED COMPONENTS filesystem)
+
+# Find deal.II
+find_package(deal.II REQUIRED)
+
+# Find yaml-cpp
+find_package(yaml-cpp REQUIRED)
+
+# deal.II setup macro
+DEAL_II_INITIALIZE_CACHED_VARIABLES()
+
+add_executable(main
+    main.cpp
+    flatset/flatset.cpp
+    filesystem/filesystem.cpp
+    fem/fem.cpp
+    yamlParser/yamlParser.cpp
+)
+
+# deal.II setup macro for target
+DEAL_II_SETUP_TARGET(main)
+
+target_link_libraries(main 
+    Boost::filesystem
+    yaml-cpp
+)
+
+target_include_directories(main PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..accb4dd
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,34 @@
+FROM ubuntu:24.04
+
+# Install dependencies
+RUN rm -rf /var/lib/apt/lists/* \
+    && apt-get update --fix-missing \
+    && apt-get install -y --no-install-recommends \
+        build-essential \
+        cmake \
+        wget \
+        unzip \
+        vim \
+        libboost-all-dev \
+        libdeal.ii-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Build and install yaml-cpp v0.6.3 from source
+RUN wget --no-check-certificate https://github.com/jbeder/yaml-cpp/archive/refs/tags/yaml-cpp-0.6.3.tar.gz \
+    && tar -xzf yaml-cpp-0.6.3.tar.gz \
+    && cd yaml-cpp-yaml-cpp-0.6.3 \
+    && mkdir build \
+    && cd build \
+    && cmake -DCMAKE_BUILD_TYPE=Release .. \
+    && make \
+    && make install \
+    && cd ../.. \
+    && rm -rf yaml-cpp-yaml-cpp-0.6.3 yaml-cpp-0.6.3.tar.gz
+
+
+# Set LD_LIBRARY_PATH to include /usr/local/lib for yaml-cpp
+ENV LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
+
+WORKDIR /workdir
+
+CMD ["/bin/bash"]
diff --git a/main.cpp b/main.cpp
index 7588360..15fa240 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,39 +1,40 @@
-//#include "fem/fem.hpp"
-//#include "flatset/flatset.hpp"
-//#include "filesystem/filesystem.hpp"
-//#include "yamlParser/yamlParser.hpp"
+#include "fem/fem.hpp"
+#include "flatset/flatset.hpp"
+#include "filesystem/filesystem.hpp"
+#include "yamlParser/yamlParser.hpp"
 #include <iostream>
 
 int main(int argc, char *argv[])
 {
   std::cout << "Let's fight with CMake, Docker, and some dependencies!" << std::endl << std::endl;
 
-  //std::cout << "Solve Poisson problem with FEM using deal.II" << std::endl;
-  //Fem fem;
-  //fem.run();
-  //std::cout << std::endl;
+  std::cout << "Solve Poisson problem with FEM using deal.II" << std::endl;
+  Fem fem;
+  fem.run();
+  std::cout << std::endl;
 
-  //std::cout << "Modify a flat set using boost container" << std::endl;
-  //modifyAndPrintSets();
-  //std::cout << std::endl;
+  std::cout << "Modify a flat set using boost container" << std::endl;
+  modifyAndPrintSets();
+  std::cout << std::endl;
 
-  //std::cout << "Inspect the current directory using boost filesystem" << std::endl;
-  //inspectDirectory();
-  //std::cout << std::endl;
+  std::cout << "Inspect the current directory using boost filesystem" << std::endl;
+  inspectDirectory();
+  std::cout << std::endl;
 
   
-  //if ( argc == 2 )
-  //{
-  //  const std::string yamlFile( argv[1] );
-  //  std::cout << "Parse some yaml file with yaml-cpp" << std::endl;
-  //  std::cout << "  " << yamlFile << std::endl;
-  //  parseConfig( yamlFile );
-  //}
-  //else
-  //{
-  //  std::cout << "To parse a yaml file please specify file on command line" << std::endl;
-  //  std::cout << "  ./main YAMLFILE" << std::endl;
-  //}
+  if ( argc == 2 )
+  {
+   const std::string yamlFile( argv[1] );
+   std::cout << "Parse some yaml file with yaml-cpp" << std::endl;
+   std::cout << "  " << yamlFile << std::endl;
+   parseConfig( yamlFile );
+  }
+  else
+  {
+   std::cout << "To parse a yaml file please specify file on command line" << std::endl;
+   std::cout << "  ./main YAMLFILE" << std::endl;
+  }
 
   return 0;
 }
+