diff --git a/hw2/Ex1/.classpath b/hw2/Ex1/.classpath
new file mode 100644
index 0000000..257061a
--- /dev/null
+++ b/hw2/Ex1/.classpath
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="out/production/Ex1"/>
+</classpath>
diff --git a/hw2/Ex1/.idea/workspace.xml b/hw2/Ex1/.idea/workspace.xml
index 68beecc..0f92ae3 100644
--- a/hw2/Ex1/.idea/workspace.xml
+++ b/hw2/Ex1/.idea/workspace.xml
@@ -2,13 +2,7 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="b727764e-c290-4ab7-a944-02a848fa4a41" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/../Ex2/.idea/Ex2.iml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/../Ex2/.idea/misc.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/../Ex2/.idea/modules.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/../Ex2/.idea/vcs.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/../Ex2/src/ConcurrentVoteCounter.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/../submission.tex" beforeDir="false" afterPath="$PROJECT_DIR$/../submission.tex" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Ex3/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Ex3/.idea/workspace.xml" afterDir="false" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
@@ -21,11 +15,11 @@
   </component>
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file pinned="false" current-in-tab="true">
+      <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/bintree/Tester.java">
           <provider selected="true" editor-type-id="text-editor">
             <state>
-              <caret lean-forward="true" selection-end-line="97" />
+              <caret selection-end-line="97" />
               <folding>
                 <element signature="e#441#442#0" expanded="true" />
                 <element signature="e#478#479#0" expanded="true" />
@@ -34,6 +28,11 @@
           </provider>
         </entry>
       </file>
+      <file pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/Ex1.eml">
+          <provider selected="true" editor-type-id="text-editor" />
+        </entry>
+      </file>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/bintree/BinTree.java">
           <provider selected="true" editor-type-id="text-editor">
@@ -125,6 +124,8 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="Scope" />
+      <pane id="PackagesPane" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
@@ -147,8 +148,6 @@
           <select />
         </subPane>
       </pane>
-      <pane id="Scope" />
-      <pane id="PackagesPane" />
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -215,17 +214,18 @@
       <workItem from="1573115639742" duration="3855000" />
       <workItem from="1573398260802" duration="3728000" />
       <workItem from="1573416058033" duration="28000" />
+      <workItem from="1573429110033" duration="27000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="7611000" />
+    <option name="totallyTimeSpent" value="7638000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="1680" height="1050" extended-state="0" />
     <editor active="true" />
     <layout>
-      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.22283272" />
+      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.22527473" />
       <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
       <window_info id="Designer" order="2" />
       <window_info id="Image Layers" order="3" />
@@ -276,7 +276,7 @@
     <entry file="file://$PROJECT_DIR$/src/bintree/Tester.java">
       <provider selected="true" editor-type-id="text-editor">
         <state>
-          <caret lean-forward="true" selection-end-line="97" />
+          <caret selection-end-line="97" />
           <folding>
             <element signature="e#441#442#0" expanded="true" />
             <element signature="e#478#479#0" expanded="true" />
@@ -322,6 +322,9 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/Ex1.eml">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
   </component>
   <component name="masterDetails">
     <states>
diff --git a/hw2/Ex1/.project b/hw2/Ex1/.project
new file mode 100644
index 0000000..c8eb749
--- /dev/null
+++ b/hw2/Ex1/.project
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Ex1</name>
+	<comment/>
+	<projects/>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments/>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/hw2/Ex1/Ex1.eml b/hw2/Ex1/Ex1.eml
new file mode 100644
index 0000000..b43aa7d
--- /dev/null
+++ b/hw2/Ex1/Ex1.eml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component inherit-compiler-output="true" inheritJdk="true">
+	<output-test url="file://$MODULE_DIR$/out/test/Ex1"/>
+	<exclude-output/>
+	<contentEntry url="file://$MODULE_DIR$">
+		<excludeFolder url="file://$MODULE_DIR$/out"/>
+	</contentEntry>
+</component>
diff --git a/hw2/Ex2/.classpath b/hw2/Ex2/.classpath
new file mode 100644
index 0000000..618e423
--- /dev/null
+++ b/hw2/Ex2/.classpath
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="out/production/Ex2"/>
+</classpath>
diff --git a/hw2/Ex2/.idea/workspace.xml b/hw2/Ex2/.idea/workspace.xml
index 54dbfcf..ef955b9 100644
--- a/hw2/Ex2/.idea/workspace.xml
+++ b/hw2/Ex2/.idea/workspace.xml
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="19fb80a5-3326-4689-b0ba-ecd6ab32d599" name="Default Changelist" comment="" />
+    <list default="true" id="19fb80a5-3326-4689-b0ba-ecd6ab32d599" name="Default Changelist" comment="">
+      <change beforePath="$PROJECT_DIR$/../Ex1/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Ex1/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../Ex3/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Ex3/.idea/workspace.xml" afterDir="false" />
+    </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -16,13 +19,8 @@
       <file pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/ConcurrentVoteCounter.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="135">
-              <caret line="9" column="64" lean-forward="true" selection-start-line="9" selection-start-column="64" selection-end-line="9" selection-end-column="64" />
-              <folding>
-                <element signature="imports" expanded="true" />
-                <element signature="e#454#455#0" expanded="true" />
-                <element signature="e#500#501#0" expanded="true" />
-              </folding>
+            <state>
+              <caret column="27" lean-forward="true" selection-start-column="27" selection-end-column="27" />
             </state>
           </provider>
         </entry>
@@ -32,10 +30,6 @@
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="30">
               <caret line="2" column="14" selection-start-line="2" selection-start-column="14" selection-end-line="2" selection-end-column="14" />
-              <folding>
-                <element signature="e#441#442#0" expanded="true" />
-                <element signature="e#478#479#0" expanded="true" />
-              </folding>
             </state>
           </provider>
         </entry>
@@ -155,17 +149,17 @@
       <updated>1573415904376</updated>
       <workItem from="1573415905557" duration="151000" />
       <workItem from="1573416086677" duration="1590000" />
+      <workItem from="1573429138414" duration="33000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="1741000" />
+    <option name="totallyTimeSpent" value="1774000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="1680" height="1050" extended-state="0" />
-    <editor active="true" />
     <layout>
-      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.25274727" />
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.25579977" />
       <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
       <window_info id="Designer" order="2" />
       <window_info id="Image Layers" order="3" />
@@ -173,7 +167,6 @@
       <window_info id="UI Designer" order="5" />
       <window_info id="Learn" order="6" />
       <window_info id="Favorites" order="7" side_tool="true" />
-      <window_info anchor="bottom" id="Messages" weight="0.32959184" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" weight="0.32959184" />
       <window_info anchor="bottom" id="Run" order="2" weight="0.32959184" />
@@ -186,6 +179,7 @@
       <window_info anchor="bottom" id="Database Changes" order="9" />
       <window_info anchor="bottom" id="Terminal" order="10" />
       <window_info anchor="bottom" id="Event Log" order="11" side_tool="true" />
+      <window_info anchor="bottom" id="Messages" order="12" weight="0.32959184" />
       <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
       <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
       <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
@@ -201,10 +195,10 @@
     <option name="version" value="1" />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/src/VoteCounter.java">
+    <entry file="file://$PROJECT_DIR$/src/ConcurrentVoteCounter.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="30">
-          <caret line="2" column="4" selection-start-line="2" selection-start-column="4" selection-end-line="2" selection-end-column="4" />
+        <state>
+          <caret column="27" lean-forward="true" selection-start-column="27" selection-end-column="27" />
         </state>
       </provider>
     </entry>
@@ -212,22 +206,13 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="30">
           <caret line="2" column="14" selection-start-line="2" selection-start-column="14" selection-end-line="2" selection-end-column="14" />
-          <folding>
-            <element signature="e#441#442#0" expanded="true" />
-            <element signature="e#478#479#0" expanded="true" />
-          </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/ConcurrentVoteCounter.java">
+    <entry file="file://$PROJECT_DIR$/src/VoteCounter.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="135">
-          <caret line="9" column="64" lean-forward="true" selection-start-line="9" selection-start-column="64" selection-end-line="9" selection-end-column="64" />
-          <folding>
-            <element signature="imports" expanded="true" />
-            <element signature="e#454#455#0" expanded="true" />
-            <element signature="e#500#501#0" expanded="true" />
-          </folding>
+        <state relative-caret-position="30">
+          <caret line="2" column="4" selection-start-line="2" selection-start-column="4" selection-end-line="2" selection-end-column="4" />
         </state>
       </provider>
     </entry>
diff --git a/hw2/Ex2/.project b/hw2/Ex2/.project
new file mode 100644
index 0000000..2224800
--- /dev/null
+++ b/hw2/Ex2/.project
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Ex2</name>
+	<comment/>
+	<projects/>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments/>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/hw2/Ex2/Ex2.eml b/hw2/Ex2/Ex2.eml
new file mode 100644
index 0000000..04c1069
--- /dev/null
+++ b/hw2/Ex2/Ex2.eml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component inherit-compiler-output="true" inheritJdk="true">
+	<output-test url="file://$MODULE_DIR$/out/test/Ex2"/>
+	<exclude-output/>
+	<contentEntry url="file://$MODULE_DIR$"/>
+</component>
diff --git a/hw2/Ex3/.classpath b/hw2/Ex3/.classpath
new file mode 100644
index 0000000..ad326fd
--- /dev/null
+++ b/hw2/Ex3/.classpath
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="out/production/Ex3"/>
+</classpath>
diff --git a/hw2/Ex3/.idea/workspace.xml b/hw2/Ex3/.idea/workspace.xml
index 7e93b11..0137c01 100644
--- a/hw2/Ex3/.idea/workspace.xml
+++ b/hw2/Ex3/.idea/workspace.xml
@@ -1,13 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="b6c476d3-708a-4f72-b206-a0dd033057e4" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/src/parallel/StreamsPrimeCounter.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/../Ex2/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../Ex2/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/parallel/ForkJoinPoolPrimeCounter.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/parallel/ForkJoinPoolPrimeCounter.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/parallel/ThreadPoolPrimeCounter.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/parallel/ThreadPoolPrimeCounter.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/test/Tester.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/Tester.java" afterDir="false" />
-    </list>
+    <list default="true" id="b6c476d3-708a-4f72-b206-a0dd033057e4" name="Default Changelist" comment="" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -20,15 +14,30 @@
   </component>
   <component name="FileEditorManager">
     <leaf>
-      <file pinned="false" current-in-tab="true">
+      <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/test/Tester.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="370">
-              <caret line="68" lean-forward="true" selection-start-line="68" selection-end-line="68" />
+            <state relative-caret-position="280">
+              <caret line="62" column="36" selection-start-line="62" selection-start-column="36" selection-end-line="62" selection-end-column="36" />
             </state>
           </provider>
         </entry>
       </file>
+      <file pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/Ex3.eml">
+          <provider selected="true" editor-type-id="text-editor" />
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/.project">
+          <provider selected="true" editor-type-id="text-editor" />
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/Ex3.userlibraries">
+          <provider selected="true" editor-type-id="text-editor" />
+        </entry>
+      </file>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/parallel/StreamsPrimeCounter.java">
           <provider selected="true" editor-type-id="text-editor">
@@ -156,6 +165,10 @@
               <item name="src" type="462c0819:PsiDirectoryNode" />
               <item name="util" type="462c0819:PsiDirectoryNode" />
             </path>
+            <path>
+              <item name="Ex3" type="b2602c69:ProjectViewProjectNode" />
+              <item name="External Libraries" type="cb654da1:ExternalLibrariesNode" />
+            </path>
           </expand>
           <select />
         </subPane>
@@ -165,6 +178,7 @@
   </component>
   <component name="PropertiesComponent">
     <property name="ASKED_SHARE_PROJECT_CONFIGURATION_FILES" value="true" />
+    <property name="SHARE_PROJECT_CONFIGURATION_FILES" value="true" />
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
@@ -216,16 +230,15 @@
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1573424652116</updated>
-      <workItem from="1573424653239" duration="3423000" />
+      <workItem from="1573424653239" duration="3583000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="3423000" />
+    <option name="totallyTimeSpent" value="3583000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="1680" height="1050" extended-state="0" />
-    <editor active="true" />
     <layout>
       <window_info id="Designer" />
       <window_info id="Image Layers" />
@@ -233,7 +246,7 @@
       <window_info id="UI Designer" />
       <window_info id="Favorites" side_tool="true" />
       <window_info id="Learn" />
-      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.24969475" />
+      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.24969475" />
       <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
       <window_info anchor="bottom" id="Terminal" />
       <window_info anchor="bottom" id="Docker" show_stripe_button="false" />
@@ -243,7 +256,7 @@
       <window_info anchor="bottom" id="Messages" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" />
-      <window_info active="true" anchor="bottom" id="Run" order="2" visible="true" weight="0.32959184" />
+      <window_info anchor="bottom" id="Run" order="2" weight="0.32959184" />
       <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
       <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
       <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
@@ -303,11 +316,20 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/test/Tester.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="370">
-          <caret line="68" lean-forward="true" selection-start-line="68" selection-end-line="68" />
+        <state relative-caret-position="280">
+          <caret line="62" column="36" selection-start-line="62" selection-start-column="36" selection-end-line="62" selection-end-column="36" />
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/Ex3.userlibraries">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/.project">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/Ex3.eml">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
   </component>
   <component name="masterDetails">
     <states>
diff --git a/hw2/Ex3/.project b/hw2/Ex3/.project
new file mode 100644
index 0000000..1cbf78e
--- /dev/null
+++ b/hw2/Ex3/.project
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Ex3</name>
+	<comment/>
+	<projects/>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments/>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/hw2/Ex3/Ex3.eml b/hw2/Ex3/Ex3.eml
new file mode 100644
index 0000000..25d97eb
--- /dev/null
+++ b/hw2/Ex3/Ex3.eml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component inherit-compiler-output="true" inheritJdk="true">
+	<output-test url="file://$MODULE_DIR$/out/test/Ex3"/>
+	<exclude-output/>
+	<contentEntry url="file://$MODULE_DIR$"/>
+</component>