diff --git a/homework4/starting_point/.idea/workspace.xml b/homework4/starting_point/.idea/workspace.xml
index 870a177..755d3ed 100644
--- a/homework4/starting_point/.idea/workspace.xml
+++ b/homework4/starting_point/.idea/workspace.xml
@@ -1,615 +1,652 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
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     <generated>
       <config projectName="Particles" targetName="particles" />
       <config projectName="Particles" targetName="test_kepler" />
       <config projectName="Particles" targetName="test_fft" />
       <config projectName="Particles" targetName="part" />
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       <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
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   <component name="ChangeListManager">
     <list default="true" id="b4e9d45a-71a7-4f96-94b1-4bcb4ac5e568" name="Default Changelist" comment="">
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       <change beforePath="$PROJECT_DIR$/CMakeLists.txt" beforeDir="false" afterPath="$PROJECT_DIR$/CMakeLists.txt" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/compute_temperature.hh" beforeDir="false" afterPath="$PROJECT_DIR$/compute_temperature.hh" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/py_part.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/py_part.cpp" afterDir="false" />
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       </usages-collector>
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     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
       <file leaf-file-name="CMakeLists.txt" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/CMakeLists.txt">
           <provider selected="true" editor-type-id="text-editor">
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+            <state relative-caret-position="266">
+              <caret line="80" lean-forward="true" selection-start-line="80" selection-end-line="80" />
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               <folding>
                 <element signature="e#20#30#0" expanded="true" />
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+      <file leaf-file-name="py_part.cpp" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/py_part.cpp">
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+        </entry>
+      </file>
+      <file leaf-file-name="compute_temperature.hh" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/compute_temperature.hh">
+          <provider selected="true" editor-type-id="text-editor">
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         <entry file="file://$PROJECT_DIR$/planets_factory.hh">
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+          </provider>
+        </entry>
+      </file>
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         <entry file="file://$PROJECT_DIR$/material_points_factory.hh">
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               <folding>
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   <component name="Git.Settings">
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   </component>
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
-        <option value="$PROJECT_DIR$/py_part.cpp" />
         <option value="$PROJECT_DIR$/main.py" />
         <option value="$PROJECT_DIR$/../../../readme.md" />
+        <option value="$PROJECT_DIR$/py_part.cpp" />
+        <option value="$PROJECT_DIR$/compute_temperature.hh" />
         <option value="$PROJECT_DIR$/CMakeLists.txt" />
       </list>
     </option>
   </component>
   <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
   <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER" />
   <component name="JsGulpfileManager">
     <detection-done>true</detection-done>
     <sorting>DEFINITION_ORDER</sorting>
   </component>
   <component name="NodePackageJsonFileManager">
     <packageJsonPaths />
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   <component name="ProjectFrameBounds">
     <option name="x" value="1" />
     <option name="y" value="23" />
     <option name="width" value="1423" />
     <option name="height" value="716" />
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   <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
   <component name="ProjectView">
     <navigator proportions="" version="1">
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
       <pane id="ProjectPane">
         <subPane>
           <expand>
             <path>
               <item name="Particles" type="b2602c69:ProjectViewProjectNode" />
               <item name="starting_point" type="462c0819:PsiDirectoryNode" />
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           <select />
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       <pane id="Scope" />
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     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
     <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
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           <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
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   <component name="RunManager" selected="Application.particles">
     <configuration name="test_fft" type="CMakeGoogleTestRunConfigurationType" factoryName="Google Test" PASS_PARENT_ENVS_2="true" PROJECT_NAME="Particles" TARGET_NAME="test_fft" CONFIG_NAME="Debug" RUN_TARGET_PROJECT_NAME="Particles" RUN_TARGET_NAME="test_fft" TEST_MODE="SUITE_TEST" />
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     <configuration name="particles" type="CMakeRunConfiguration" factoryName="Application" PASS_PARENT_ENVS_2="true" PROJECT_NAME="Particles" TARGET_NAME="particles" CONFIG_NAME="Debug" RUN_TARGET_PROJECT_NAME="Particles" RUN_TARGET_NAME="particles" />
     <list>
       <item itemvalue="Application.Build All" />
       <item itemvalue="Application.part" />
       <item itemvalue="Application.particles" />
       <item itemvalue="Google Test.test_fft" />
       <item itemvalue="Google Test.test_kepler" />
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   <component name="SvnConfiguration">
     <configuration />
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     <task active="true" id="Default" summary="Default task">
       <changelist id="b4e9d45a-71a7-4f96-94b1-4bcb4ac5e568" name="Default Changelist" comment="" />
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       <configuration name="test_fft" configurationId="CMakeGoogleTestRunConfigurationType" />
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   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="33517000" />
+    <option name="totallyTimeSpent" value="36168000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="1" y="23" width="1423" height="716" extended-state="0" />
     <editor active="true" />
     <layout>
       <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.22182596" />
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   <component name="VcsContentAnnotationSettings">
     <option name="myLimit" value="2678400000" />
   </component>
   <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/../README.md">
+      <provider selected="true" editor-type-id="text-editor">
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+          <caret line="8" lean-forward="true" selection-start-line="5" selection-end-line="8" />
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           <caret line="8" lean-forward="true" selection-start-line="5" selection-end-line="8" />
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     </entry>
+    <entry file="file://$PROJECT_DIR$/system_evolution.hh">
+      <provider selected="true" editor-type-id="text-editor">
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           <caret line="39" lean-forward="true" selection-start-line="39" selection-end-line="39" />
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             <element signature="e#1200#1215#0" expanded="true" />
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+    <entry file="file://$PROJECT_DIR$/planets_factory.hh">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/py_part.cpp">
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+    <entry file="file://$PROJECT_DIR$/compute_temperature.hh">
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+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/CMakeLists.txt">
       <provider selected="true" editor-type-id="text-editor">
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+          <caret line="80" lean-forward="true" selection-start-line="80" selection-end-line="80" />
         </state>
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   </component>
   <component name="masterDetails">
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       </state>
     </states>
   </component>
 </project>
\ No newline at end of file
diff --git a/homework4/starting_point/CMakeLists.txt b/homework4/starting_point/CMakeLists.txt
index a15b9ea..f9b61d4 100644
--- a/homework4/starting_point/CMakeLists.txt
+++ b/homework4/starting_point/CMakeLists.txt
@@ -1,102 +1,101 @@
 cmake_minimum_required (VERSION 3.1)
 project (Particles)
 cmake_policy(VERSION 3.3)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
 
 ################################################################
 # FFTW
 ################################################################
 
 find_package(FFTW)
 
 ################################################################
 # libpart
 ################################################################
 
 add_library(part SHARED
   compute_boundary.cc
   compute_verlet_integration.cc 
   particle.cc 
   planet.cc
   compute_gravity.cc 
   csv_reader.cc 
   particles_factory_interface.cc 
   planets_factory.cc 
   compute_contact.cc 
   compute_kinetic_energy.cc 
   csv_writer.cc 
   system.cc 
   compute_energy.cc 
   compute_potential_energy.cc 
   ping_pong_ball.cc
   material_point.cc 
   system_evolution.cc 
   ping_pong_balls_factory.cc 
   compute_interaction.cc
   compute_temperature.cc
   material_points_factory.cc 
   )
 
 target_link_libraries(part ${FFTW_LIBRARIES})
 add_executable(particles main.cc)
 target_link_libraries(particles part)
 
 
-
 ################################################################
 # Google test
 ################################################################
 
 
 include(GoogleTest)
 enable_testing()
 find_package(GTest)
 if (GTEST_FOUND)
     include_directories(${GTEST_INCLUDE_DIRS})
     add_executable(test_kepler test_kepler.cc)
     add_executable(test_fft test_fft.cc)
     target_link_libraries(test_kepler part ${GTEST_BOTH_LIBRARIES} pthread)
     target_link_libraries(test_fft part ${GTEST_BOTH_LIBRARIES} ${FFTW_LIBRARIES} pthread)
     gtest_discover_tests(test_kepler)
     gtest_discover_tests(test_fft)
 endif()
 
 ################################################################
 # Doxygen
 ################################################################
 
 find_package(Doxygen)
 if (DOXYGEN_FOUND)
 
     # to set other options, read: https://cmake.org/cmake/help/v3.9/module/FindDoxygen.html
     doxygen_add_docs(
             doxygen
             ${PROJECT_SOURCE_DIR}
             COMMENT "Generate html pages"
     )
     add_custom_target(doc DEPENDS doxygen)
 endif(DOXYGEN_FOUND)
 
 ################################################################
 # Pypart
 ################################################################
 
 option (WITH_PYTHON "Python wrapper" ON)
 
 if(WITH_PYTHON)
     find_package(pybind11 REQUIRED)
 
     add_library(pypart MODULE py_part.cpp)
     target_link_libraries(pypart PRIVATE part)
     target_link_libraries(pypart PRIVATE pybind11::module)
     set_target_properties(pypart PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}"
             SUFFIX "${PYTHON_MODULE_EXTENSION}")
 
     file(
             COPY ${CMAKE_CURRENT_SOURCE_DIR}/main.py
             DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/
     )
 endif(WITH_PYTHON)
\ No newline at end of file
diff --git a/homework4/starting_point/build-cmake-debug/CMakeCache.txt b/homework4/starting_point/build-cmake-debug/CMakeCache.txt
new file mode 100644
index 0000000..1c5c0aa
--- /dev/null
+++ b/homework4/starting_point/build-cmake-debug/CMakeCache.txt
@@ -0,0 +1,361 @@
+# This is the CMakeCache file.
+# For build in directory: /Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/build-cmake-debug
+# It was generated by CMake: /usr/local/Cellar/cmake/3.7.2/bin/cmake
+# You can edit this file to change values found and used by cmake.
+# If you do not want to change any of the values, simply exit the editor.
+# If you do want to change a value, simply edit, save, and exit the editor.
+# The syntax for the file is as follows:
+# KEY:TYPE=VALUE
+# KEY is the name of a variable in the cache.
+# TYPE is a hint to GUIs for the type of VALUE, DO NOT EDIT TYPE!.
+# VALUE is the current value for the KEY.
+
+########################
+# EXTERNAL cache entries
+########################
+
+//Path to a program.
+CMAKE_AR:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/ar
+
+//Choose the type of build, options are: None(CMAKE_CXX_FLAGS or
+// CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.
+CMAKE_BUILD_TYPE:STRING=
+
+//Enable/Disable color output during build.
+CMAKE_COLOR_MAKEFILE:BOOL=ON
+
+//CXX compiler
+CMAKE_CXX_COMPILER:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/c++
+
+//Flags used by the compiler during all build types.
+CMAKE_CXX_FLAGS:STRING=
+
+//Flags used by the compiler during debug builds.
+CMAKE_CXX_FLAGS_DEBUG:STRING=-g
+
+//Flags used by the compiler during release builds for minimum
+// size.
+CMAKE_CXX_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG
+
+//Flags used by the compiler during release builds.
+CMAKE_CXX_FLAGS_RELEASE:STRING=-O3 -DNDEBUG
+
+//Flags used by the compiler during release builds with debug info.
+CMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING=-O2 -g -DNDEBUG
+
+//C compiler
+CMAKE_C_COMPILER:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/cc
+
+//Flags used by the compiler during all build types.
+CMAKE_C_FLAGS:STRING=
+
+//Flags used by the compiler during debug builds.
+CMAKE_C_FLAGS_DEBUG:STRING=-g
+
+//Flags used by the compiler during release builds for minimum
+// size.
+CMAKE_C_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG
+
+//Flags used by the compiler during release builds.
+CMAKE_C_FLAGS_RELEASE:STRING=-O3 -DNDEBUG
+
+//Flags used by the compiler during release builds with debug info.
+CMAKE_C_FLAGS_RELWITHDEBINFO:STRING=-O2 -g -DNDEBUG
+
+//Flags used by the linker.
+CMAKE_EXE_LINKER_FLAGS:STRING=
+
+//Flags used by the linker during debug builds.
+CMAKE_EXE_LINKER_FLAGS_DEBUG:STRING=
+
+//Flags used by the linker during release minsize builds.
+CMAKE_EXE_LINKER_FLAGS_MINSIZEREL:STRING=
+
+//Flags used by the linker during release builds.
+CMAKE_EXE_LINKER_FLAGS_RELEASE:STRING=
+
+//Flags used by the linker during Release with Debug Info builds.
+CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO:STRING=
+
+//Enable/Disable output of compile commands during generation.
+CMAKE_EXPORT_COMPILE_COMMANDS:BOOL=OFF
+
+//Path to a program.
+CMAKE_INSTALL_NAME_TOOL:FILEPATH=/usr/bin/install_name_tool
+
+//Install path prefix, prepended onto install directories.
+CMAKE_INSTALL_PREFIX:PATH=/usr/local
+
+//Path to a program.
+CMAKE_LINKER:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/ld
+
+//Path to a program.
+CMAKE_MAKE_PROGRAM:FILEPATH=/usr/bin/make
+
+//Flags used by the linker during the creation of modules.
+CMAKE_MODULE_LINKER_FLAGS:STRING=
+
+//Flags used by the linker during debug builds.
+CMAKE_MODULE_LINKER_FLAGS_DEBUG:STRING=
+
+//Flags used by the linker during release minsize builds.
+CMAKE_MODULE_LINKER_FLAGS_MINSIZEREL:STRING=
+
+//Flags used by the linker during release builds.
+CMAKE_MODULE_LINKER_FLAGS_RELEASE:STRING=
+
+//Flags used by the linker during Release with Debug Info builds.
+CMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO:STRING=
+
+//Path to a program.
+CMAKE_NM:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/nm
+
+//Path to a program.
+CMAKE_OBJCOPY:FILEPATH=CMAKE_OBJCOPY-NOTFOUND
+
+//Path to a program.
+CMAKE_OBJDUMP:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/objdump
+
+//Build architectures for OSX
+CMAKE_OSX_ARCHITECTURES:STRING=
+
+//Minimum OS X version to target for deployment (at runtime); newer
+// APIs weak linked. Set to empty string for default value.
+CMAKE_OSX_DEPLOYMENT_TARGET:STRING=
+
+//The product will be built against the headers and libraries located
+// inside the indicated SDK.
+CMAKE_OSX_SYSROOT:STRING=
+
+//Value Computed by CMake
+CMAKE_PROJECT_NAME:STATIC=Particles
+
+//Path to a program.
+CMAKE_RANLIB:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/ranlib
+
+//Flags used by the linker during the creation of dll's.
+CMAKE_SHARED_LINKER_FLAGS:STRING=
+
+//Flags used by the linker during debug builds.
+CMAKE_SHARED_LINKER_FLAGS_DEBUG:STRING=
+
+//Flags used by the linker during release minsize builds.
+CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL:STRING=
+
+//Flags used by the linker during release builds.
+CMAKE_SHARED_LINKER_FLAGS_RELEASE:STRING=
+
+//Flags used by the linker during Release with Debug Info builds.
+CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO:STRING=
+
+//If set, runtime paths are not added when installing shared libraries,
+// but are added when building.
+CMAKE_SKIP_INSTALL_RPATH:BOOL=NO
+
+//If set, runtime paths are not added when using shared libraries.
+CMAKE_SKIP_RPATH:BOOL=NO
+
+//Flags used by the linker during the creation of static libraries.
+CMAKE_STATIC_LINKER_FLAGS:STRING=
+
+//Flags used by the linker during debug builds.
+CMAKE_STATIC_LINKER_FLAGS_DEBUG:STRING=
+
+//Flags used by the linker during release minsize builds.
+CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL:STRING=
+
+//Flags used by the linker during release builds.
+CMAKE_STATIC_LINKER_FLAGS_RELEASE:STRING=
+
+//Flags used by the linker during Release with Debug Info builds.
+CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO:STRING=
+
+//Path to a program.
+CMAKE_STRIP:FILEPATH=/Library/Developer/CommandLineTools/usr/bin/strip
+
+//If this value is on, makefiles will be generated without the
+// .SILENT directive, and all commands will be echoed to the console
+// during the make.  This is useful for debugging only. With Visual
+// Studio IDE projects all commands are done without /nologo.
+CMAKE_VERBOSE_MAKEFILE:BOOL=FALSE
+
+//Path to a file.
+FFTW_INCLUDE:PATH=/usr/local/include
+
+//path where to search fftw include files
+FFTW_INCLUDE_PATH:PATH=
+
+//Path to a library.
+FFTW_LIBRARIES:FILEPATH=/usr/local/lib/libfftw3.dylib
+
+//library where to search libfftw
+FFTW_LIBRARY_PATH:PATH=
+
+//Python version to use for compiling modules
+PYBIND11_PYTHON_VERSION:STRING=
+
+//Path to a program.
+PYTHON_EXECUTABLE:FILEPATH=/Users/alessia/anaconda3/bin/python3.6
+
+//Path to a library.
+PYTHON_LIBRARY:FILEPATH=/Users/alessia/anaconda3/lib/libpython3.6m.dylib
+
+//Value Computed by CMake
+Particles_BINARY_DIR:STATIC=/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/build-cmake-debug
+
+//Value Computed by CMake
+Particles_SOURCE_DIR:STATIC=/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point
+
+//Python wrapper
+WITH_PYTHON:BOOL=ON
+
+//Dependencies for the target
+part_LIB_DEPENDS:STATIC=general;/usr/local/lib/libfftw3.dylib;
+
+//The directory containing a CMake configuration file for pybind11.
+pybind11_DIR:PATH=/Users/alessia/anaconda3/share/cmake/pybind11
+
+//Dependencies for the target
+pypart_LIB_DEPENDS:STATIC=general;part;
+
+
+########################
+# INTERNAL cache entries
+########################
+
+//ADVANCED property for variable: CMAKE_AR
+CMAKE_AR-ADVANCED:INTERNAL=1
+//This is the directory where this CMakeCache.txt was created
+CMAKE_CACHEFILE_DIR:INTERNAL=/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/build-cmake-debug
+//Major version of cmake used to create the current loaded cache
+CMAKE_CACHE_MAJOR_VERSION:INTERNAL=3
+//Minor version of cmake used to create the current loaded cache
+CMAKE_CACHE_MINOR_VERSION:INTERNAL=7
+//Patch version of cmake used to create the current loaded cache
+CMAKE_CACHE_PATCH_VERSION:INTERNAL=2
+//ADVANCED property for variable: CMAKE_COLOR_MAKEFILE
+CMAKE_COLOR_MAKEFILE-ADVANCED:INTERNAL=1
+//Path to CMake executable.
+CMAKE_COMMAND:INTERNAL=/usr/local/Cellar/cmake/3.7.2/bin/cmake
+//Path to cpack program executable.
+CMAKE_CPACK_COMMAND:INTERNAL=/usr/local/Cellar/cmake/3.7.2/bin/cpack
+//Path to ctest program executable.
+CMAKE_CTEST_COMMAND:INTERNAL=/usr/local/Cellar/cmake/3.7.2/bin/ctest
+//ADVANCED property for variable: CMAKE_CXX_COMPILER
+CMAKE_CXX_COMPILER-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_CXX_FLAGS
+CMAKE_CXX_FLAGS-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_CXX_FLAGS_DEBUG
+CMAKE_CXX_FLAGS_DEBUG-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_CXX_FLAGS_MINSIZEREL
+CMAKE_CXX_FLAGS_MINSIZEREL-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_CXX_FLAGS_RELEASE
+CMAKE_CXX_FLAGS_RELEASE-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_CXX_FLAGS_RELWITHDEBINFO
+CMAKE_CXX_FLAGS_RELWITHDEBINFO-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_C_COMPILER
+CMAKE_C_COMPILER-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_C_FLAGS
+CMAKE_C_FLAGS-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_C_FLAGS_DEBUG
+CMAKE_C_FLAGS_DEBUG-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_C_FLAGS_MINSIZEREL
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+//ADVANCED property for variable: CMAKE_C_FLAGS_RELEASE
+CMAKE_C_FLAGS_RELEASE-ADVANCED:INTERNAL=1
+//ADVANCED property for variable: CMAKE_C_FLAGS_RELWITHDEBINFO
+CMAKE_C_FLAGS_RELWITHDEBINFO-ADVANCED:INTERNAL=1
+//Path to cache edit program executable.
+CMAKE_EDIT_COMMAND:INTERNAL=/usr/local/Cellar/cmake/3.7.2/bin/ccmake
+//Executable file format
+CMAKE_EXECUTABLE_FORMAT:INTERNAL=Unknown
+//ADVANCED property for variable: CMAKE_EXE_LINKER_FLAGS
+CMAKE_EXE_LINKER_FLAGS-ADVANCED:INTERNAL=1
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+#  define COMPILER_VERSION_PATCH DEC(__PGIC_PATCHLEVEL__)
+# endif
+
+#elif defined(_CRAYC)
+# define COMPILER_ID "Cray"
+# define COMPILER_VERSION_MAJOR DEC(_RELEASE_MAJOR)
+# define COMPILER_VERSION_MINOR DEC(_RELEASE_MINOR)
+
+#elif defined(__TI_COMPILER_VERSION__)
+# define COMPILER_ID "TI"
+  /* __TI_COMPILER_VERSION__ = VVVRRRPPP */
+# define COMPILER_VERSION_MAJOR DEC(__TI_COMPILER_VERSION__/1000000)
+# define COMPILER_VERSION_MINOR DEC(__TI_COMPILER_VERSION__/1000   % 1000)
+# define COMPILER_VERSION_PATCH DEC(__TI_COMPILER_VERSION__        % 1000)
+
+#elif defined(__FUJITSU) || defined(__FCC_VERSION) || defined(__fcc_version)
+# define COMPILER_ID "Fujitsu"
+
+#elif defined(__TINYC__)
+# define COMPILER_ID "TinyCC"
+
+#elif defined(__BCC__)
+# define COMPILER_ID "Bruce"
+
+#elif defined(__SCO_VERSION__)
+# define COMPILER_ID "SCO"
+
+#elif defined(__clang__) && defined(__apple_build_version__)
+# define COMPILER_ID "AppleClang"
+# if defined(_MSC_VER)
+#  define SIMULATE_ID "MSVC"
+# endif
+# define COMPILER_VERSION_MAJOR DEC(__clang_major__)
+# define COMPILER_VERSION_MINOR DEC(__clang_minor__)
+# define COMPILER_VERSION_PATCH DEC(__clang_patchlevel__)
+# if defined(_MSC_VER)
+   /* _MSC_VER = VVRR */
+#  define SIMULATE_VERSION_MAJOR DEC(_MSC_VER / 100)
+#  define SIMULATE_VERSION_MINOR DEC(_MSC_VER % 100)
+# endif
+# define COMPILER_VERSION_TWEAK DEC(__apple_build_version__)
+
+#elif defined(__clang__)
+# define COMPILER_ID "Clang"
+# if defined(_MSC_VER)
+#  define SIMULATE_ID "MSVC"
+# endif
+# define COMPILER_VERSION_MAJOR DEC(__clang_major__)
+# define COMPILER_VERSION_MINOR DEC(__clang_minor__)
+# define COMPILER_VERSION_PATCH DEC(__clang_patchlevel__)
+# if defined(_MSC_VER)
+   /* _MSC_VER = VVRR */
+#  define SIMULATE_VERSION_MAJOR DEC(_MSC_VER / 100)
+#  define SIMULATE_VERSION_MINOR DEC(_MSC_VER % 100)
+# endif
+
+#elif defined(__GNUC__)
+# define COMPILER_ID "GNU"
+# define COMPILER_VERSION_MAJOR DEC(__GNUC__)
+# if defined(__GNUC_MINOR__)
+#  define COMPILER_VERSION_MINOR DEC(__GNUC_MINOR__)
+# endif
+# if defined(__GNUC_PATCHLEVEL__)
+#  define COMPILER_VERSION_PATCH DEC(__GNUC_PATCHLEVEL__)
+# endif
+
+#elif defined(_MSC_VER)
+# define COMPILER_ID "MSVC"
+  /* _MSC_VER = VVRR */
+# define COMPILER_VERSION_MAJOR DEC(_MSC_VER / 100)
+# define COMPILER_VERSION_MINOR DEC(_MSC_VER % 100)
+# if defined(_MSC_FULL_VER)
+#  if _MSC_VER >= 1400
+    /* _MSC_FULL_VER = VVRRPPPPP */
+#   define COMPILER_VERSION_PATCH DEC(_MSC_FULL_VER % 100000)
+#  else
+    /* _MSC_FULL_VER = VVRRPPPP */
+#   define COMPILER_VERSION_PATCH DEC(_MSC_FULL_VER % 10000)
+#  endif
+# endif
+# if defined(_MSC_BUILD)
+#  define COMPILER_VERSION_TWEAK DEC(_MSC_BUILD)
+# endif
+
+#elif defined(__VISUALDSPVERSION__) || defined(__ADSPBLACKFIN__) || defined(__ADSPTS__) || defined(__ADSP21000__)
+# define COMPILER_ID "ADSP"
+#if defined(__VISUALDSPVERSION__)
+  /* __VISUALDSPVERSION__ = 0xVVRRPP00 */
+# define COMPILER_VERSION_MAJOR HEX(__VISUALDSPVERSION__>>24)
+# define COMPILER_VERSION_MINOR HEX(__VISUALDSPVERSION__>>16 & 0xFF)
+# define COMPILER_VERSION_PATCH HEX(__VISUALDSPVERSION__>>8  & 0xFF)
+#endif
+
+#elif defined(__IAR_SYSTEMS_ICC__ ) || defined(__IAR_SYSTEMS_ICC)
+# define COMPILER_ID "IAR"
+
+#elif defined(__ARMCC_VERSION)
+# define COMPILER_ID "ARMCC"
+#if __ARMCC_VERSION >= 1000000
+  /* __ARMCC_VERSION = VRRPPPP */
+  # define COMPILER_VERSION_MAJOR DEC(__ARMCC_VERSION/1000000)
+  # define COMPILER_VERSION_MINOR DEC(__ARMCC_VERSION/10000 % 100)
+  # define COMPILER_VERSION_PATCH DEC(__ARMCC_VERSION     % 10000)
+#else
+  /* __ARMCC_VERSION = VRPPPP */
+  # define COMPILER_VERSION_MAJOR DEC(__ARMCC_VERSION/100000)
+  # define COMPILER_VERSION_MINOR DEC(__ARMCC_VERSION/10000 % 10)
+  # define COMPILER_VERSION_PATCH DEC(__ARMCC_VERSION    % 10000)
+#endif
+
+
+#elif defined(SDCC)
+# define COMPILER_ID "SDCC"
+  /* SDCC = VRP */
+#  define COMPILER_VERSION_MAJOR DEC(SDCC/100)
+#  define COMPILER_VERSION_MINOR DEC(SDCC/10 % 10)
+#  define COMPILER_VERSION_PATCH DEC(SDCC    % 10)
+
+#elif defined(_SGI_COMPILER_VERSION) || defined(_COMPILER_VERSION)
+# define COMPILER_ID "MIPSpro"
+# if defined(_SGI_COMPILER_VERSION)
+  /* _SGI_COMPILER_VERSION = VRP */
+#  define COMPILER_VERSION_MAJOR DEC(_SGI_COMPILER_VERSION/100)
+#  define COMPILER_VERSION_MINOR DEC(_SGI_COMPILER_VERSION/10 % 10)
+#  define COMPILER_VERSION_PATCH DEC(_SGI_COMPILER_VERSION    % 10)
+# else
+  /* _COMPILER_VERSION = VRP */
+#  define COMPILER_VERSION_MAJOR DEC(_COMPILER_VERSION/100)
+#  define COMPILER_VERSION_MINOR DEC(_COMPILER_VERSION/10 % 10)
+#  define COMPILER_VERSION_PATCH DEC(_COMPILER_VERSION    % 10)
+# endif
+
+
+/* These compilers are either not known or too old to define an
+  identification macro.  Try to identify the platform and guess that
+  it is the native compiler.  */
+#elif defined(__sgi)
+# define COMPILER_ID "MIPSpro"
+
+#elif defined(__hpux) || defined(__hpua)
+# define COMPILER_ID "HP"
+
+#else /* unknown compiler */
+# define COMPILER_ID ""
+#endif
+
+/* Construct the string literal in pieces to prevent the source from
+   getting matched.  Store it in a pointer rather than an array
+   because some compilers will just produce instructions to fill the
+   array rather than assigning a pointer to a static array.  */
+char const* info_compiler = "INFO" ":" "compiler[" COMPILER_ID "]";
+#ifdef SIMULATE_ID
+char const* info_simulate = "INFO" ":" "simulate[" SIMULATE_ID "]";
+#endif
+
+#ifdef __QNXNTO__
+char const* qnxnto = "INFO" ":" "qnxnto[]";
+#endif
+
+#if defined(__CRAYXE) || defined(__CRAYXC)
+char const *info_cray = "INFO" ":" "compiler_wrapper[CrayPrgEnv]";
+#endif
+
+#define STRINGIFY_HELPER(X) #X
+#define STRINGIFY(X) STRINGIFY_HELPER(X)
+
+/* Identify known platforms by name.  */
+#if defined(__linux) || defined(__linux__) || defined(linux)
+# define PLATFORM_ID "Linux"
+
+#elif defined(__CYGWIN__)
+# define PLATFORM_ID "Cygwin"
+
+#elif defined(__MINGW32__)
+# define PLATFORM_ID "MinGW"
+
+#elif defined(__APPLE__)
+# define PLATFORM_ID "Darwin"
+
+#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
+# define PLATFORM_ID "Windows"
+
+#elif defined(__FreeBSD__) || defined(__FreeBSD)
+# define PLATFORM_ID "FreeBSD"
+
+#elif defined(__NetBSD__) || defined(__NetBSD)
+# define PLATFORM_ID "NetBSD"
+
+#elif defined(__OpenBSD__) || defined(__OPENBSD)
+# define PLATFORM_ID "OpenBSD"
+
+#elif defined(__sun) || defined(sun)
+# define PLATFORM_ID "SunOS"
+
+#elif defined(_AIX) || defined(__AIX) || defined(__AIX__) || defined(__aix) || defined(__aix__)
+# define PLATFORM_ID "AIX"
+
+#elif defined(__sgi) || defined(__sgi__) || defined(_SGI)
+# define PLATFORM_ID "IRIX"
+
+#elif defined(__hpux) || defined(__hpux__)
+# define PLATFORM_ID "HP-UX"
+
+#elif defined(__HAIKU__)
+# define PLATFORM_ID "Haiku"
+
+#elif defined(__BeOS) || defined(__BEOS__) || defined(_BEOS)
+# define PLATFORM_ID "BeOS"
+
+#elif defined(__QNX__) || defined(__QNXNTO__)
+# define PLATFORM_ID "QNX"
+
+#elif defined(__tru64) || defined(_tru64) || defined(__TRU64__)
+# define PLATFORM_ID "Tru64"
+
+#elif defined(__riscos) || defined(__riscos__)
+# define PLATFORM_ID "RISCos"
+
+#elif defined(__sinix) || defined(__sinix__) || defined(__SINIX__)
+# define PLATFORM_ID "SINIX"
+
+#elif defined(__UNIX_SV__)
+# define PLATFORM_ID "UNIX_SV"
+
+#elif defined(__bsdos__)
+# define PLATFORM_ID "BSDOS"
+
+#elif defined(_MPRAS) || defined(MPRAS)
+# define PLATFORM_ID "MP-RAS"
+
+#elif defined(__osf) || defined(__osf__)
+# define PLATFORM_ID "OSF1"
+
+#elif defined(_SCO_SV) || defined(SCO_SV) || defined(sco_sv)
+# define PLATFORM_ID "SCO_SV"
+
+#elif defined(__ultrix) || defined(__ultrix__) || defined(_ULTRIX)
+# define PLATFORM_ID "ULTRIX"
+
+#elif defined(__XENIX__) || defined(_XENIX) || defined(XENIX)
+# define PLATFORM_ID "Xenix"
+
+#elif defined(__WATCOMC__)
+# if defined(__LINUX__)
+#  define PLATFORM_ID "Linux"
+
+# elif defined(__DOS__)
+#  define PLATFORM_ID "DOS"
+
+# elif defined(__OS2__)
+#  define PLATFORM_ID "OS2"
+
+# elif defined(__WINDOWS__)
+#  define PLATFORM_ID "Windows3x"
+
+# else /* unknown platform */
+#  define PLATFORM_ID
+# endif
+
+#else /* unknown platform */
+# define PLATFORM_ID
+
+#endif
+
+/* For windows compilers MSVC and Intel we can determine
+   the architecture of the compiler being used.  This is because
+   the compilers do not have flags that can change the architecture,
+   but rather depend on which compiler is being used
+*/
+#if defined(_WIN32) && defined(_MSC_VER)
+# if defined(_M_IA64)
+#  define ARCHITECTURE_ID "IA64"
+
+# elif defined(_M_X64) || defined(_M_AMD64)
+#  define ARCHITECTURE_ID "x64"
+
+# elif defined(_M_IX86)
+#  define ARCHITECTURE_ID "X86"
+
+# elif defined(_M_ARM)
+#  if _M_ARM == 4
+#   define ARCHITECTURE_ID "ARMV4I"
+#  elif _M_ARM == 5
+#   define ARCHITECTURE_ID "ARMV5I"
+#  else
+#   define ARCHITECTURE_ID "ARMV" STRINGIFY(_M_ARM)
+#  endif
+
+# elif defined(_M_MIPS)
+#  define ARCHITECTURE_ID "MIPS"
+
+# elif defined(_M_SH)
+#  define ARCHITECTURE_ID "SHx"
+
+# else /* unknown architecture */
+#  define ARCHITECTURE_ID ""
+# endif
+
+#elif defined(__WATCOMC__)
+# if defined(_M_I86)
+#  define ARCHITECTURE_ID "I86"
+
+# elif defined(_M_IX86)
+#  define ARCHITECTURE_ID "X86"
+
+# else /* unknown architecture */
+#  define ARCHITECTURE_ID ""
+# endif
+
+#else
+#  define ARCHITECTURE_ID
+#endif
+
+/* Convert integer to decimal digit literals.  */
+#define DEC(n)                   \
+  ('0' + (((n) / 10000000)%10)), \
+  ('0' + (((n) / 1000000)%10)),  \
+  ('0' + (((n) / 100000)%10)),   \
+  ('0' + (((n) / 10000)%10)),    \
+  ('0' + (((n) / 1000)%10)),     \
+  ('0' + (((n) / 100)%10)),      \
+  ('0' + (((n) / 10)%10)),       \
+  ('0' +  ((n) % 10))
+
+/* Convert integer to hex digit literals.  */
+#define HEX(n)             \
+  ('0' + ((n)>>28 & 0xF)), \
+  ('0' + ((n)>>24 & 0xF)), \
+  ('0' + ((n)>>20 & 0xF)), \
+  ('0' + ((n)>>16 & 0xF)), \
+  ('0' + ((n)>>12 & 0xF)), \
+  ('0' + ((n)>>8  & 0xF)), \
+  ('0' + ((n)>>4  & 0xF)), \
+  ('0' + ((n)     & 0xF))
+
+/* Construct a string literal encoding the version number components. */
+#ifdef COMPILER_VERSION_MAJOR
+char const info_version[] = {
+  'I', 'N', 'F', 'O', ':',
+  'c','o','m','p','i','l','e','r','_','v','e','r','s','i','o','n','[',
+  COMPILER_VERSION_MAJOR,
+# ifdef COMPILER_VERSION_MINOR
+  '.', COMPILER_VERSION_MINOR,
+#  ifdef COMPILER_VERSION_PATCH
+   '.', COMPILER_VERSION_PATCH,
+#   ifdef COMPILER_VERSION_TWEAK
+    '.', COMPILER_VERSION_TWEAK,
+#   endif
+#  endif
+# endif
+  ']','\0'};
+#endif
+
+/* Construct a string literal encoding the version number components. */
+#ifdef SIMULATE_VERSION_MAJOR
+char const info_simulate_version[] = {
+  'I', 'N', 'F', 'O', ':',
+  's','i','m','u','l','a','t','e','_','v','e','r','s','i','o','n','[',
+  SIMULATE_VERSION_MAJOR,
+# ifdef SIMULATE_VERSION_MINOR
+  '.', SIMULATE_VERSION_MINOR,
+#  ifdef SIMULATE_VERSION_PATCH
+   '.', SIMULATE_VERSION_PATCH,
+#   ifdef SIMULATE_VERSION_TWEAK
+    '.', SIMULATE_VERSION_TWEAK,
+#   endif
+#  endif
+# endif
+  ']','\0'};
+#endif
+
+/* Construct the string literal in pieces to prevent the source from
+   getting matched.  Store it in a pointer rather than an array
+   because some compilers will just produce instructions to fill the
+   array rather than assigning a pointer to a static array.  */
+char const* info_platform = "INFO" ":" "platform[" PLATFORM_ID "]";
+char const* info_arch = "INFO" ":" "arch[" ARCHITECTURE_ID "]";
+
+
+
+
+#if !defined(__STDC__)
+# if defined(_MSC_VER) && !defined(__clang__)
+#  define C_DIALECT "90"
+# else
+#  define C_DIALECT
+# endif
+#elif __STDC_VERSION__ >= 201000L
+# define C_DIALECT "11"
+#elif __STDC_VERSION__ >= 199901L
+# define C_DIALECT "99"
+#else
+# define C_DIALECT "90"
+#endif
+const char* info_language_dialect_default =
+  "INFO" ":" "dialect_default[" C_DIALECT "]";
+
+/*--------------------------------------------------------------------------*/
+
+#ifdef ID_VOID_MAIN
+void main() {}
+#else
+# if defined(__CLASSIC_C__)
+int main(argc, argv) int argc; char *argv[];
+# else
+int main(int argc, char* argv[])
+# endif
+{
+  int require = 0;
+  require += info_compiler[argc];
+  require += info_platform[argc];
+  require += info_arch[argc];
+#ifdef COMPILER_VERSION_MAJOR
+  require += info_version[argc];
+#endif
+#ifdef SIMULATE_ID
+  require += info_simulate[argc];
+#endif
+#ifdef SIMULATE_VERSION_MAJOR
+  require += info_simulate_version[argc];
+#endif
+#if defined(__CRAYXE) || defined(__CRAYXC)
+  require += info_cray[argc];
+#endif
+  require += info_language_dialect_default[argc];
+  (void)argv;
+  return require;
+}
+#endif
diff --git a/homework4/starting_point/build-cmake-debug/CMakeFiles/3.7.2/CompilerIdC/a.out b/homework4/starting_point/build-cmake-debug/CMakeFiles/3.7.2/CompilerIdC/a.out
new file mode 100755
index 0000000..3490f74
Binary files /dev/null and b/homework4/starting_point/build-cmake-debug/CMakeFiles/3.7.2/CompilerIdC/a.out differ
diff --git a/homework4/starting_point/build-cmake-debug/CMakeFiles/3.7.2/CompilerIdCXX/CMakeCXXCompilerId.cpp b/homework4/starting_point/build-cmake-debug/CMakeFiles/3.7.2/CompilerIdCXX/CMakeCXXCompilerId.cpp
new file mode 100644
index 0000000..a6e6bed
--- /dev/null
+++ b/homework4/starting_point/build-cmake-debug/CMakeFiles/3.7.2/CompilerIdCXX/CMakeCXXCompilerId.cpp
@@ -0,0 +1,533 @@
+/* This source file must have a .cpp extension so that all C++ compilers
+   recognize the extension without flags.  Borland does not know .cxx for
+   example.  */
+#ifndef __cplusplus
+# error "A C compiler has been selected for C++."
+#endif
+
+
+/* Version number components: V=Version, R=Revision, P=Patch
+   Version date components:   YYYY=Year, MM=Month,   DD=Day  */
+
+#if defined(__COMO__)
+# define COMPILER_ID "Comeau"
+  /* __COMO_VERSION__ = VRR */
+# define COMPILER_VERSION_MAJOR DEC(__COMO_VERSION__ / 100)
+# define COMPILER_VERSION_MINOR DEC(__COMO_VERSION__ % 100)
+
+#elif defined(__INTEL_COMPILER) || defined(__ICC)
+# define COMPILER_ID "Intel"
+# if defined(_MSC_VER)
+#  define SIMULATE_ID "MSVC"
+# endif
+  /* __INTEL_COMPILER = VRP */
+# define COMPILER_VERSION_MAJOR DEC(__INTEL_COMPILER/100)
+# define COMPILER_VERSION_MINOR DEC(__INTEL_COMPILER/10 % 10)
+# if defined(__INTEL_COMPILER_UPDATE)
+#  define COMPILER_VERSION_PATCH DEC(__INTEL_COMPILER_UPDATE)
+# else
+#  define COMPILER_VERSION_PATCH DEC(__INTEL_COMPILER   % 10)
+# endif
+# if defined(__INTEL_COMPILER_BUILD_DATE)
+  /* __INTEL_COMPILER_BUILD_DATE = YYYYMMDD */
+#  define COMPILER_VERSION_TWEAK DEC(__INTEL_COMPILER_BUILD_DATE)
+# endif
+# if defined(_MSC_VER)
+   /* _MSC_VER = VVRR */
+#  define SIMULATE_VERSION_MAJOR DEC(_MSC_VER / 100)
+#  define SIMULATE_VERSION_MINOR DEC(_MSC_VER % 100)
+# endif
+
+#elif defined(__PATHCC__)
+# define COMPILER_ID "PathScale"
+# define COMPILER_VERSION_MAJOR DEC(__PATHCC__)
+# define COMPILER_VERSION_MINOR DEC(__PATHCC_MINOR__)
+# if defined(__PATHCC_PATCHLEVEL__)
+#  define COMPILER_VERSION_PATCH DEC(__PATHCC_PATCHLEVEL__)
+# endif
+
+#elif defined(__BORLANDC__) && defined(__CODEGEARC_VERSION__)
+# define COMPILER_ID "Embarcadero"
+# define COMPILER_VERSION_MAJOR HEX(__CODEGEARC_VERSION__>>24 & 0x00FF)
+# define COMPILER_VERSION_MINOR HEX(__CODEGEARC_VERSION__>>16 & 0x00FF)
+# define COMPILER_VERSION_PATCH DEC(__CODEGEARC_VERSION__     & 0xFFFF)
+
+#elif defined(__BORLANDC__)
+# define COMPILER_ID "Borland"
+  /* __BORLANDC__ = 0xVRR */
+# define COMPILER_VERSION_MAJOR HEX(__BORLANDC__>>8)
+# define COMPILER_VERSION_MINOR HEX(__BORLANDC__ & 0xFF)
+
+#elif defined(__WATCOMC__) && __WATCOMC__ < 1200
+# define COMPILER_ID "Watcom"
+   /* __WATCOMC__ = VVRR */
+# define COMPILER_VERSION_MAJOR DEC(__WATCOMC__ / 100)
+# define COMPILER_VERSION_MINOR DEC((__WATCOMC__ / 10) % 10)
+# if (__WATCOMC__ % 10) > 0
+#  define COMPILER_VERSION_PATCH DEC(__WATCOMC__ % 10)
+# endif
+
+#elif defined(__WATCOMC__)
+# define COMPILER_ID "OpenWatcom"
+   /* __WATCOMC__ = VVRP + 1100 */
+# define COMPILER_VERSION_MAJOR DEC((__WATCOMC__ - 1100) / 100)
+# define COMPILER_VERSION_MINOR DEC((__WATCOMC__ / 10) % 10)
+# if (__WATCOMC__ % 10) > 0
+#  define COMPILER_VERSION_PATCH DEC(__WATCOMC__ % 10)
+# endif
+
+#elif defined(__SUNPRO_CC)
+# define COMPILER_ID "SunPro"
+# if __SUNPRO_CC >= 0x5100
+   /* __SUNPRO_CC = 0xVRRP */
+#  define COMPILER_VERSION_MAJOR HEX(__SUNPRO_CC>>12)
+#  define COMPILER_VERSION_MINOR HEX(__SUNPRO_CC>>4 & 0xFF)
+#  define COMPILER_VERSION_PATCH HEX(__SUNPRO_CC    & 0xF)
+# else
+   /* __SUNPRO_CC = 0xVRP */
+#  define COMPILER_VERSION_MAJOR HEX(__SUNPRO_CC>>8)
+#  define COMPILER_VERSION_MINOR HEX(__SUNPRO_CC>>4 & 0xF)
+#  define COMPILER_VERSION_PATCH HEX(__SUNPRO_CC    & 0xF)
+# endif
+
+#elif defined(__HP_aCC)
+# define COMPILER_ID "HP"
+  /* __HP_aCC = VVRRPP */
+# define COMPILER_VERSION_MAJOR DEC(__HP_aCC/10000)
+# define COMPILER_VERSION_MINOR DEC(__HP_aCC/100 % 100)
+# define COMPILER_VERSION_PATCH DEC(__HP_aCC     % 100)
+
+#elif defined(__DECCXX)
+# define COMPILER_ID "Compaq"
+  /* __DECCXX_VER = VVRRTPPPP */
+# define COMPILER_VERSION_MAJOR DEC(__DECCXX_VER/10000000)
+# define COMPILER_VERSION_MINOR DEC(__DECCXX_VER/100000  % 100)
+# define COMPILER_VERSION_PATCH DEC(__DECCXX_VER         % 10000)
+
+#elif defined(__IBMCPP__) && defined(__COMPILER_VER__)
+# define COMPILER_ID "zOS"
+  /* __IBMCPP__ = VRP */
+# define COMPILER_VERSION_MAJOR DEC(__IBMCPP__/100)
+# define COMPILER_VERSION_MINOR DEC(__IBMCPP__/10 % 10)
+# define COMPILER_VERSION_PATCH DEC(__IBMCPP__    % 10)
+
+#elif defined(__IBMCPP__) && !defined(__COMPILER_VER__) && __IBMCPP__ >= 800
+# define COMPILER_ID "XL"
+  /* __IBMCPP__ = VRP */
+# define COMPILER_VERSION_MAJOR DEC(__IBMCPP__/100)
+# define COMPILER_VERSION_MINOR DEC(__IBMCPP__/10 % 10)
+# define COMPILER_VERSION_PATCH DEC(__IBMCPP__    % 10)
+
+#elif defined(__IBMCPP__) && !defined(__COMPILER_VER__) && __IBMCPP__ < 800
+# define COMPILER_ID "VisualAge"
+  /* __IBMCPP__ = VRP */
+# define COMPILER_VERSION_MAJOR DEC(__IBMCPP__/100)
+# define COMPILER_VERSION_MINOR DEC(__IBMCPP__/10 % 10)
+# define COMPILER_VERSION_PATCH DEC(__IBMCPP__    % 10)
+
+#elif defined(__PGI)
+# define COMPILER_ID "PGI"
+# define COMPILER_VERSION_MAJOR DEC(__PGIC__)
+# define COMPILER_VERSION_MINOR DEC(__PGIC_MINOR__)
+# if defined(__PGIC_PATCHLEVEL__)
+#  define COMPILER_VERSION_PATCH DEC(__PGIC_PATCHLEVEL__)
+# endif
+
+#elif defined(_CRAYC)
+# define COMPILER_ID "Cray"
+# define COMPILER_VERSION_MAJOR DEC(_RELEASE_MAJOR)
+# define COMPILER_VERSION_MINOR DEC(_RELEASE_MINOR)
+
+#elif defined(__TI_COMPILER_VERSION__)
+# define COMPILER_ID "TI"
+  /* __TI_COMPILER_VERSION__ = VVVRRRPPP */
+# define COMPILER_VERSION_MAJOR DEC(__TI_COMPILER_VERSION__/1000000)
+# define COMPILER_VERSION_MINOR DEC(__TI_COMPILER_VERSION__/1000   % 1000)
+# define COMPILER_VERSION_PATCH DEC(__TI_COMPILER_VERSION__        % 1000)
+
+#elif defined(__FUJITSU) || defined(__FCC_VERSION) || defined(__fcc_version)
+# define COMPILER_ID "Fujitsu"
+
+#elif defined(__SCO_VERSION__)
+# define COMPILER_ID "SCO"
+
+#elif defined(__clang__) && defined(__apple_build_version__)
+# define COMPILER_ID "AppleClang"
+# if defined(_MSC_VER)
+#  define SIMULATE_ID "MSVC"
+# endif
+# define COMPILER_VERSION_MAJOR DEC(__clang_major__)
+# define COMPILER_VERSION_MINOR DEC(__clang_minor__)
+# define COMPILER_VERSION_PATCH DEC(__clang_patchlevel__)
+# if defined(_MSC_VER)
+   /* _MSC_VER = VVRR */
+#  define SIMULATE_VERSION_MAJOR DEC(_MSC_VER / 100)
+#  define SIMULATE_VERSION_MINOR DEC(_MSC_VER % 100)
+# endif
+# define COMPILER_VERSION_TWEAK DEC(__apple_build_version__)
+
+#elif defined(__clang__)
+# define COMPILER_ID "Clang"
+# if defined(_MSC_VER)
+#  define SIMULATE_ID "MSVC"
+# endif
+# define COMPILER_VERSION_MAJOR DEC(__clang_major__)
+# define COMPILER_VERSION_MINOR DEC(__clang_minor__)
+# define COMPILER_VERSION_PATCH DEC(__clang_patchlevel__)
+# if defined(_MSC_VER)
+   /* _MSC_VER = VVRR */
+#  define SIMULATE_VERSION_MAJOR DEC(_MSC_VER / 100)
+#  define SIMULATE_VERSION_MINOR DEC(_MSC_VER % 100)
+# endif
+
+#elif defined(__GNUC__)
+# define COMPILER_ID "GNU"
+# define COMPILER_VERSION_MAJOR DEC(__GNUC__)
+# if defined(__GNUC_MINOR__)
+#  define COMPILER_VERSION_MINOR DEC(__GNUC_MINOR__)
+# endif
+# if defined(__GNUC_PATCHLEVEL__)
+#  define COMPILER_VERSION_PATCH DEC(__GNUC_PATCHLEVEL__)
+# endif
+
+#elif defined(_MSC_VER)
+# define COMPILER_ID "MSVC"
+  /* _MSC_VER = VVRR */
+# define COMPILER_VERSION_MAJOR DEC(_MSC_VER / 100)
+# define COMPILER_VERSION_MINOR DEC(_MSC_VER % 100)
+# if defined(_MSC_FULL_VER)
+#  if _MSC_VER >= 1400
+    /* _MSC_FULL_VER = VVRRPPPPP */
+#   define COMPILER_VERSION_PATCH DEC(_MSC_FULL_VER % 100000)
+#  else
+    /* _MSC_FULL_VER = VVRRPPPP */
+#   define COMPILER_VERSION_PATCH DEC(_MSC_FULL_VER % 10000)
+#  endif
+# endif
+# if defined(_MSC_BUILD)
+#  define COMPILER_VERSION_TWEAK DEC(_MSC_BUILD)
+# endif
+
+#elif defined(__VISUALDSPVERSION__) || defined(__ADSPBLACKFIN__) || defined(__ADSPTS__) || defined(__ADSP21000__)
+# define COMPILER_ID "ADSP"
+#if defined(__VISUALDSPVERSION__)
+  /* __VISUALDSPVERSION__ = 0xVVRRPP00 */
+# define COMPILER_VERSION_MAJOR HEX(__VISUALDSPVERSION__>>24)
+# define COMPILER_VERSION_MINOR HEX(__VISUALDSPVERSION__>>16 & 0xFF)
+# define COMPILER_VERSION_PATCH HEX(__VISUALDSPVERSION__>>8  & 0xFF)
+#endif
+
+#elif defined(__IAR_SYSTEMS_ICC__ ) || defined(__IAR_SYSTEMS_ICC)
+# define COMPILER_ID "IAR"
+
+#elif defined(__ARMCC_VERSION)
+# define COMPILER_ID "ARMCC"
+#if __ARMCC_VERSION >= 1000000
+  /* __ARMCC_VERSION = VRRPPPP */
+  # define COMPILER_VERSION_MAJOR DEC(__ARMCC_VERSION/1000000)
+  # define COMPILER_VERSION_MINOR DEC(__ARMCC_VERSION/10000 % 100)
+  # define COMPILER_VERSION_PATCH DEC(__ARMCC_VERSION     % 10000)
+#else
+  /* __ARMCC_VERSION = VRPPPP */
+  # define COMPILER_VERSION_MAJOR DEC(__ARMCC_VERSION/100000)
+  # define COMPILER_VERSION_MINOR DEC(__ARMCC_VERSION/10000 % 10)
+  # define COMPILER_VERSION_PATCH DEC(__ARMCC_VERSION    % 10000)
+#endif
+
+
+#elif defined(_SGI_COMPILER_VERSION) || defined(_COMPILER_VERSION)
+# define COMPILER_ID "MIPSpro"
+# if defined(_SGI_COMPILER_VERSION)
+  /* _SGI_COMPILER_VERSION = VRP */
+#  define COMPILER_VERSION_MAJOR DEC(_SGI_COMPILER_VERSION/100)
+#  define COMPILER_VERSION_MINOR DEC(_SGI_COMPILER_VERSION/10 % 10)
+#  define COMPILER_VERSION_PATCH DEC(_SGI_COMPILER_VERSION    % 10)
+# else
+  /* _COMPILER_VERSION = VRP */
+#  define COMPILER_VERSION_MAJOR DEC(_COMPILER_VERSION/100)
+#  define COMPILER_VERSION_MINOR DEC(_COMPILER_VERSION/10 % 10)
+#  define COMPILER_VERSION_PATCH DEC(_COMPILER_VERSION    % 10)
+# endif
+
+
+/* These compilers are either not known or too old to define an
+  identification macro.  Try to identify the platform and guess that
+  it is the native compiler.  */
+#elif defined(__sgi)
+# define COMPILER_ID "MIPSpro"
+
+#elif defined(__hpux) || defined(__hpua)
+# define COMPILER_ID "HP"
+
+#else /* unknown compiler */
+# define COMPILER_ID ""
+#endif
+
+/* Construct the string literal in pieces to prevent the source from
+   getting matched.  Store it in a pointer rather than an array
+   because some compilers will just produce instructions to fill the
+   array rather than assigning a pointer to a static array.  */
+char const* info_compiler = "INFO" ":" "compiler[" COMPILER_ID "]";
+#ifdef SIMULATE_ID
+char const* info_simulate = "INFO" ":" "simulate[" SIMULATE_ID "]";
+#endif
+
+#ifdef __QNXNTO__
+char const* qnxnto = "INFO" ":" "qnxnto[]";
+#endif
+
+#if defined(__CRAYXE) || defined(__CRAYXC)
+char const *info_cray = "INFO" ":" "compiler_wrapper[CrayPrgEnv]";
+#endif
+
+#define STRINGIFY_HELPER(X) #X
+#define STRINGIFY(X) STRINGIFY_HELPER(X)
+
+/* Identify known platforms by name.  */
+#if defined(__linux) || defined(__linux__) || defined(linux)
+# define PLATFORM_ID "Linux"
+
+#elif defined(__CYGWIN__)
+# define PLATFORM_ID "Cygwin"
+
+#elif defined(__MINGW32__)
+# define PLATFORM_ID "MinGW"
+
+#elif defined(__APPLE__)
+# define PLATFORM_ID "Darwin"
+
+#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
+# define PLATFORM_ID "Windows"
+
+#elif defined(__FreeBSD__) || defined(__FreeBSD)
+# define PLATFORM_ID "FreeBSD"
+
+#elif defined(__NetBSD__) || defined(__NetBSD)
+# define PLATFORM_ID "NetBSD"
+
+#elif defined(__OpenBSD__) || defined(__OPENBSD)
+# define PLATFORM_ID "OpenBSD"
+
+#elif defined(__sun) || defined(sun)
+# define PLATFORM_ID "SunOS"
+
+#elif defined(_AIX) || defined(__AIX) || defined(__AIX__) || defined(__aix) || defined(__aix__)
+# define PLATFORM_ID "AIX"
+
+#elif defined(__sgi) || defined(__sgi__) || defined(_SGI)
+# define PLATFORM_ID "IRIX"
+
+#elif defined(__hpux) || defined(__hpux__)
+# define PLATFORM_ID "HP-UX"
+
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+# define PLATFORM_ID "Haiku"
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+
+#elif defined(__QNX__) || defined(__QNXNTO__)
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+
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+# define PLATFORM_ID "Tru64"
+
+#elif defined(__riscos) || defined(__riscos__)
+# define PLATFORM_ID "RISCos"
+
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+# define PLATFORM_ID "SINIX"
+
+#elif defined(__UNIX_SV__)
+# define PLATFORM_ID "UNIX_SV"
+
+#elif defined(__bsdos__)
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+
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+# define PLATFORM_ID "MP-RAS"
+
+#elif defined(__osf) || defined(__osf__)
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+
+#elif defined(_SCO_SV) || defined(SCO_SV) || defined(sco_sv)
+# define PLATFORM_ID "SCO_SV"
+
+#elif defined(__ultrix) || defined(__ultrix__) || defined(_ULTRIX)
+# define PLATFORM_ID "ULTRIX"
+
+#elif defined(__XENIX__) || defined(_XENIX) || defined(XENIX)
+# define PLATFORM_ID "Xenix"
+
+#elif defined(__WATCOMC__)
+# if defined(__LINUX__)
+#  define PLATFORM_ID "Linux"
+
+# elif defined(__DOS__)
+#  define PLATFORM_ID "DOS"
+
+# elif defined(__OS2__)
+#  define PLATFORM_ID "OS2"
+
+# elif defined(__WINDOWS__)
+#  define PLATFORM_ID "Windows3x"
+
+# else /* unknown platform */
+#  define PLATFORM_ID
+# endif
+
+#else /* unknown platform */
+# define PLATFORM_ID
+
+#endif
+
+/* For windows compilers MSVC and Intel we can determine
+   the architecture of the compiler being used.  This is because
+   the compilers do not have flags that can change the architecture,
+   but rather depend on which compiler is being used
+*/
+#if defined(_WIN32) && defined(_MSC_VER)
+# if defined(_M_IA64)
+#  define ARCHITECTURE_ID "IA64"
+
+# elif defined(_M_X64) || defined(_M_AMD64)
+#  define ARCHITECTURE_ID "x64"
+
+# elif defined(_M_IX86)
+#  define ARCHITECTURE_ID "X86"
+
+# elif defined(_M_ARM)
+#  if _M_ARM == 4
+#   define ARCHITECTURE_ID "ARMV4I"
+#  elif _M_ARM == 5
+#   define ARCHITECTURE_ID "ARMV5I"
+#  else
+#   define ARCHITECTURE_ID "ARMV" STRINGIFY(_M_ARM)
+#  endif
+
+# elif defined(_M_MIPS)
+#  define ARCHITECTURE_ID "MIPS"
+
+# elif defined(_M_SH)
+#  define ARCHITECTURE_ID "SHx"
+
+# else /* unknown architecture */
+#  define ARCHITECTURE_ID ""
+# endif
+
+#elif defined(__WATCOMC__)
+# if defined(_M_I86)
+#  define ARCHITECTURE_ID "I86"
+
+# elif defined(_M_IX86)
+#  define ARCHITECTURE_ID "X86"
+
+# else /* unknown architecture */
+#  define ARCHITECTURE_ID ""
+# endif
+
+#else
+#  define ARCHITECTURE_ID
+#endif
+
+/* Convert integer to decimal digit literals.  */
+#define DEC(n)                   \
+  ('0' + (((n) / 10000000)%10)), \
+  ('0' + (((n) / 1000000)%10)),  \
+  ('0' + (((n) / 100000)%10)),   \
+  ('0' + (((n) / 10000)%10)),    \
+  ('0' + (((n) / 1000)%10)),     \
+  ('0' + (((n) / 100)%10)),      \
+  ('0' + (((n) / 10)%10)),       \
+  ('0' +  ((n) % 10))
+
+/* Convert integer to hex digit literals.  */
+#define HEX(n)             \
+  ('0' + ((n)>>28 & 0xF)), \
+  ('0' + ((n)>>24 & 0xF)), \
+  ('0' + ((n)>>20 & 0xF)), \
+  ('0' + ((n)>>16 & 0xF)), \
+  ('0' + ((n)>>12 & 0xF)), \
+  ('0' + ((n)>>8  & 0xF)), \
+  ('0' + ((n)>>4  & 0xF)), \
+  ('0' + ((n)     & 0xF))
+
+/* Construct a string literal encoding the version number components. */
+#ifdef COMPILER_VERSION_MAJOR
+char const info_version[] = {
+  'I', 'N', 'F', 'O', ':',
+  'c','o','m','p','i','l','e','r','_','v','e','r','s','i','o','n','[',
+  COMPILER_VERSION_MAJOR,
+# ifdef COMPILER_VERSION_MINOR
+  '.', COMPILER_VERSION_MINOR,
+#  ifdef COMPILER_VERSION_PATCH
+   '.', COMPILER_VERSION_PATCH,
+#   ifdef COMPILER_VERSION_TWEAK
+    '.', COMPILER_VERSION_TWEAK,
+#   endif
+#  endif
+# endif
+  ']','\0'};
+#endif
+
+/* Construct a string literal encoding the version number components. */
+#ifdef SIMULATE_VERSION_MAJOR
+char const info_simulate_version[] = {
+  'I', 'N', 'F', 'O', ':',
+  's','i','m','u','l','a','t','e','_','v','e','r','s','i','o','n','[',
+  SIMULATE_VERSION_MAJOR,
+# ifdef SIMULATE_VERSION_MINOR
+  '.', SIMULATE_VERSION_MINOR,
+#  ifdef SIMULATE_VERSION_PATCH
+   '.', SIMULATE_VERSION_PATCH,
+#   ifdef SIMULATE_VERSION_TWEAK
+    '.', SIMULATE_VERSION_TWEAK,
+#   endif
+#  endif
+# endif
+  ']','\0'};
+#endif
+
+/* Construct the string literal in pieces to prevent the source from
+   getting matched.  Store it in a pointer rather than an array
+   because some compilers will just produce instructions to fill the
+   array rather than assigning a pointer to a static array.  */
+char const* info_platform = "INFO" ":" "platform[" PLATFORM_ID "]";
+char const* info_arch = "INFO" ":" "arch[" ARCHITECTURE_ID "]";
+
+
+
+
+const char* info_language_dialect_default = "INFO" ":" "dialect_default["
+#if __cplusplus >= 201402L
+  "14"
+#elif __cplusplus >= 201103L
+  "11"
+#else
+  "98"
+#endif
+"]";
+
+/*--------------------------------------------------------------------------*/
+
+int main(int argc, char* argv[])
+{
+  int require = 0;
+  require += info_compiler[argc];
+  require += info_platform[argc];
+#ifdef COMPILER_VERSION_MAJOR
+  require += info_version[argc];
+#endif
+#ifdef SIMULATE_ID
+  require += info_simulate[argc];
+#endif
+#ifdef SIMULATE_VERSION_MAJOR
+  require += info_simulate_version[argc];
+#endif
+#if defined(__CRAYXE) || defined(__CRAYXC)
+  require += info_cray[argc];
+#endif
+  require += info_language_dialect_default[argc];
+  (void)argv;
+  return require;
+}
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+  "command": "/Library/Developer/CommandLineTools/usr/bin/c++   -Dpart_EXPORTS -I/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/FFTW_INCLUDE  -fPIC   -std=gnu++14 -o CMakeFiles/part.dir/ping_pong_balls_factory.cc.o -c /Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/ping_pong_balls_factory.cc",
+  "file": "/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/ping_pong_balls_factory.cc"
+},
+{
+  "directory": "/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/build-cmake-debug",
+  "command": "/Library/Developer/CommandLineTools/usr/bin/c++   -Dpart_EXPORTS -I/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/FFTW_INCLUDE  -fPIC   -std=gnu++14 -o CMakeFiles/part.dir/compute_interaction.cc.o -c /Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/compute_interaction.cc",
+  "file": "/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/compute_interaction.cc"
+},
+{
+  "directory": "/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/build-cmake-debug",
+  "command": "/Library/Developer/CommandLineTools/usr/bin/c++   -Dpart_EXPORTS -I/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/FFTW_INCLUDE  -fPIC   -std=gnu++14 -o CMakeFiles/part.dir/compute_temperature.cc.o -c /Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/compute_temperature.cc",
+  "file": "/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/compute_temperature.cc"
+},
+{
+  "directory": "/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/build-cmake-debug",
+  "command": "/Library/Developer/CommandLineTools/usr/bin/c++   -Dpart_EXPORTS -I/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/FFTW_INCLUDE  -fPIC   -std=gnu++14 -o CMakeFiles/part.dir/material_points_factory.cc.o -c /Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/material_points_factory.cc",
+  "file": "/Users/alessia/Desktop/SP4E_HW1/homework4/starting_point/material_points_factory.cc"
+}
+]
\ No newline at end of file
diff --git a/homework4/starting_point/build-cmake-debug/libpart.dylib b/homework4/starting_point/build-cmake-debug/libpart.dylib
new file mode 100755
index 0000000..ef9a6c1
Binary files /dev/null and b/homework4/starting_point/build-cmake-debug/libpart.dylib differ
diff --git a/homework4/starting_point/build-cmake-debug/main.py b/homework4/starting_point/build-cmake-debug/main.py
new file mode 100644
index 0000000..4fba865
--- /dev/null
+++ b/homework4/starting_point/build-cmake-debug/main.py
@@ -0,0 +1,62 @@
+#!/bin/env python3
+
+import sys
+import argparse
+from pypart import MaterialPointsFactory, ParticlesFactoryInterface
+from pypart import PingPongBallsFactory, PlanetsFactory
+from pypart import CsvWriter
+from pypart import ComputeTemperature
+# help(pypart)
+
+parser = argparse.ArgumentParser(description='Particles code')
+parser.add_argument('nsteps', type=int,
+                    help='specify the number of steps to perform')
+parser.add_argument('freq', type=int,
+                    help='specify the frequency for dumps')
+parser.add_argument('filename', type=str,
+                    help='start/input filename')
+parser.add_argument('particle_type', type=str,
+                    help='particle type')
+parser.add_argument('timestep', type=float,
+                    help='timestep')
+
+args = parser.parse_args()
+nsteps = args.nsteps
+freq = args.freq
+filename = args.filename
+particle_type = args.particle_type
+timestep = args.timestep
+
+if particle_type == "planet":
+    PlanetsFactory.getInstance()
+elif particle_type == "ping_pong":
+    PingPongBallsFactory.getInstance()
+elif particle_type == "material_point":
+    MaterialPointsFactory.getInstance()
+else:
+    print("Unknown particle type: ", particle_type)
+    sys.exit(-1)
+
+factory = ParticlesFactoryInterface.getInstance()
+
+if particle_type == "material_point":
+    def createComputes(self, timestep):
+        compute_temp = ComputeTemperature()
+        compute_temp.conductivity = 1
+        compute_temp.L = 2
+        compute_temp.capacity = 1
+        compute_temp.density = 1
+        compute_temp.deltat = 1
+        self.system_evolution.addCompute(compute_temp)
+    
+    evol = factory.createSimulation(filename, timestep, createComputes)
+    
+else:
+    evol = factory.createSimulation(filename, timestep)
+
+dumper = CsvWriter("init.csv")
+dumper.write(evol.getSystem())
+
+evol.setNSteps(nsteps)
+evol.setDumpFreq(freq)
+evol.evolve()
diff --git a/homework4/starting_point/build-cmake-debug/particles b/homework4/starting_point/build-cmake-debug/particles
new file mode 100755
index 0000000..6370dfc
Binary files /dev/null and b/homework4/starting_point/build-cmake-debug/particles differ
diff --git a/homework4/starting_point/build-cmake-debug/pypart.cpython-36m-darwin.so b/homework4/starting_point/build-cmake-debug/pypart.cpython-36m-darwin.so
new file mode 100755
index 0000000..223a7eb
Binary files /dev/null and b/homework4/starting_point/build-cmake-debug/pypart.cpython-36m-darwin.so differ
diff --git a/homework4/starting_point/compute_temperature.hh b/homework4/starting_point/compute_temperature.hh
index 1e185ba..0f7ff41 100644
--- a/homework4/starting_point/compute_temperature.hh
+++ b/homework4/starting_point/compute_temperature.hh
@@ -1,38 +1,43 @@
 #ifndef __COMPUTE_TEMPERATURE__HH__
 #define __COMPUTE_TEMPERATURE__HH__
 
 /* -------------------------------------------------------------------------- */
 #include "compute.hh"
 
 //! Compute contact interaction between ping-pong balls
 class ComputeTemperature : public Compute {
   
 public:
   //! temperature evolution implementation
   void compute(System& system) override;
 
   //! return the heat conductivity
   Real & getConductivity(){return conductivity;};
+  void setConductivity(const Real &conductivity_) { conductivity = conductivity_; }
   //! return the heat capacity
   Real & getCapacity(){return capacity;};
+  void setCapacity(const Real &capacity_) { capacity = capacity_; }
   //! return the heat capacity
   Real & getDensity(){return density;};
+  void setDensity(const Real &density_) { density = density_; }
   //! return the characteristic length of the square
   Real & getL(){return L;};
+  void setL(const Real &L_) { L= L_; }
   //! return the characteristic length of the square
   Real & getDeltat(){return delta_t;};
+  void setDeltat(const Real &delta_t_) { delta_t = delta_t_; }
 
   bool implicit = true;
 private:
   
   Real conductivity;
   Real capacity;
   Real density;
   //! side length of the problem
   Real L;
 
   Real delta_t;
 };
 
 /* -------------------------------------------------------------------------- */
 #endif  //__COMPUTE_TEMPERATURE__HH__