diff --git a/sem2/test2.1/.idea/.name b/sem2/test2.1/.idea/.name
new file mode 100644
index 0000000..c142a6f
--- /dev/null
+++ b/sem2/test2.1/.idea/.name
@@ -0,0 +1 @@
+myplugin
\ No newline at end of file
diff --git a/sem2/test2.1/.idea/compiler.xml b/sem2/test2.1/.idea/compiler.xml
new file mode 100644
index 0000000..84dc463
--- /dev/null
+++ b/sem2/test2.1/.idea/compiler.xml
@@ -0,0 +1,13 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/sem2/test2.1/.idea/encodings.xml b/sem2/test2.1/.idea/encodings.xml
new file mode 100644
index 0000000..15a15b2
--- /dev/null
+++ b/sem2/test2.1/.idea/encodings.xml
@@ -0,0 +1,4 @@
+
+
+
+
\ No newline at end of file
diff --git a/sem2/test2.1/.idea/gradle.xml b/sem2/test2.1/.idea/gradle.xml
new file mode 100644
index 0000000..3163861
--- /dev/null
+++ b/sem2/test2.1/.idea/gradle.xml
@@ -0,0 +1,18 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/sem2/test2.1/.idea/misc.xml b/sem2/test2.1/.idea/misc.xml
new file mode 100644
index 0000000..29af3ee
--- /dev/null
+++ b/sem2/test2.1/.idea/misc.xml
@@ -0,0 +1,7 @@
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/sem2/test2.1/build.gradle b/sem2/test2.1/build.gradle
new file mode 100644
index 0000000..2355bc5
--- /dev/null
+++ b/sem2/test2.1/build.gradle
@@ -0,0 +1,21 @@
+plugins {
+ id 'java'
+}
+
+group 'test2.1'
+version '1.0-SNAPSHOT'
+
+sourceCompatibility = 11
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ testCompile('org.junit.jupiter:junit-jupiter-api:5.3.2')
+ testCompile('org.junit.jupiter:junit-jupiter-engine:5.3.2')
+}
+
+test {
+ useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/sem2/test2.1/gradle/wrapper/gradle-wrapper.jar b/sem2/test2.1/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..28861d2
Binary files /dev/null and b/sem2/test2.1/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/sem2/test2.1/gradle/wrapper/gradle-wrapper.properties b/sem2/test2.1/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..cf30e2c
--- /dev/null
+++ b/sem2/test2.1/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Sun May 05 18:32:26 GMT+03:00 2019
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10-all.zip
diff --git a/sem2/test2.1/gradlew b/sem2/test2.1/gradlew
new file mode 100644
index 0000000..cccdd3d
--- /dev/null
+++ b/sem2/test2.1/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+## Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+ ls=`ls -ld "$PRG"`
+ link=`expr "$ls" : '.*-> \(.*\)$'`
+ if expr "$link" : '/.*' > /dev/null; then
+ PRG="$link"
+ else
+ PRG=`dirname "$PRG"`"/$link"
+ fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+ echo "$*"
+}
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+ CYGWIN* )
+ cygwin=true
+ ;;
+ Darwin* )
+ darwin=true
+ ;;
+ MINGW* )
+ msys=true
+ ;;
+ NONSTOP* )
+ nonstop=true
+ ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD="java"
+ which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+ MAX_FD_LIMIT=`ulimit -H -n`
+ if [ $? -eq 0 ] ; then
+ if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+ MAX_FD="$MAX_FD_LIMIT"
+ fi
+ ulimit -n $MAX_FD
+ if [ $? -ne 0 ] ; then
+ warn "Could not set maximum file descriptor limit: $MAX_FD"
+ fi
+ else
+ warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+ fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+ GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+ APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+ CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+ JAVACMD=`cygpath --unix "$JAVACMD"`
+
+ # We build the pattern for arguments to be converted via cygpath
+ ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+ SEP=""
+ for dir in $ROOTDIRSRAW ; do
+ ROOTDIRS="$ROOTDIRS$SEP$dir"
+ SEP="|"
+ done
+ OURCYGPATTERN="(^($ROOTDIRS))"
+ # Add a user-defined pattern to the cygpath arguments
+ if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+ OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+ fi
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ i=0
+ for arg in "$@" ; do
+ CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+ CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
+
+ if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
+ eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+ else
+ eval `echo args$i`="\"$arg\""
+ fi
+ i=$((i+1))
+ done
+ case $i in
+ (0) set -- ;;
+ (1) set -- "$args0" ;;
+ (2) set -- "$args0" "$args1" ;;
+ (3) set -- "$args0" "$args1" "$args2" ;;
+ (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+ (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+ (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+ (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+ (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+ (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+ esac
+fi
+
+# Escape application args
+save () {
+ for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+ echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+ cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/sem2/test2.1/gradlew.bat b/sem2/test2.1/gradlew.bat
new file mode 100644
index 0000000..f955316
--- /dev/null
+++ b/sem2/test2.1/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/sem2/test2.1/settings.gradle b/sem2/test2.1/settings.gradle
new file mode 100644
index 0000000..b0bb33d
--- /dev/null
+++ b/sem2/test2.1/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = 'myplugin'
+
diff --git a/sem2/test2.1/src/main/java/com/AntonChernikov/g144/Application.java b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/Application.java
new file mode 100644
index 0000000..6e72bb4
--- /dev/null
+++ b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/Application.java
@@ -0,0 +1,40 @@
+package com.AntonChernikov.g144;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+
+/**
+ * Class describing work with sorted set
+ * */
+public class Application {
+
+ private SortedSet set;
+
+ public Application() {
+ set = new SortedSet();
+ }
+
+ /**
+ * Method splitting lines into word lists and adding lists to the set
+ * */
+ public void addWords(String[] object) {
+ for (String current : object) {
+ String[] words = current.split(" ");
+ set.add(new LinkedList(Arrays.asList(words)));
+ }
+ }
+
+ /**
+ * Method printing set
+ * */
+ public String print() {
+ return set.print();
+ }
+
+ /**
+ * Method checking set for emptiness
+ * */
+ public boolean isEmpty() {
+ return set.isEmpty();
+ }
+}
\ No newline at end of file
diff --git a/sem2/test2.1/src/main/java/com/AntonChernikov/g144/Comparator.java b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/Comparator.java
new file mode 100644
index 0000000..a78051e
--- /dev/null
+++ b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/Comparator.java
@@ -0,0 +1,14 @@
+package com.AntonChernikov.g144;
+
+import java.util.LinkedList;
+
+public class Comparator implements ListsComparator {
+
+ /**
+ * {@inheritDoc}
+ * */
+ @Override
+ public int compare(LinkedList first, LinkedList second) {
+ return first.size() - second.size();
+ }
+}
diff --git a/sem2/test2.1/src/main/java/com/AntonChernikov/g144/ListsComparator.java b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/ListsComparator.java
new file mode 100644
index 0000000..220ebdd
--- /dev/null
+++ b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/ListsComparator.java
@@ -0,0 +1,13 @@
+package com.AntonChernikov.g144;
+
+import java.util.LinkedList;
+
+/**
+ * Interface describing list's comparator
+ * */
+public interface ListsComparator {
+ /**
+ * Method comparing two lists
+ * */
+ int compare(LinkedList first, LinkedList second);
+}
diff --git a/sem2/test2.1/src/main/java/com/AntonChernikov/g144/SortedSet.java b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/SortedSet.java
new file mode 100644
index 0000000..d799b00
--- /dev/null
+++ b/sem2/test2.1/src/main/java/com/AntonChernikov/g144/SortedSet.java
@@ -0,0 +1,68 @@
+package com.AntonChernikov.g144;
+
+import java.util.LinkedList;
+
+/**
+ * Class describing sorted set
+ * */
+public class SortedSet {
+
+ private LinkedList set;
+
+ public SortedSet() {
+ set = new LinkedList<>();
+ }
+
+ /**
+ * Method checking set for emptiness
+ * */
+ public boolean isEmpty() {
+ return set.size() == 0;
+ }
+
+ /**
+ * Method adding list to set
+ * */
+ public void add(LinkedList list) {
+ if (isEmpty()) {
+ set.add(list);
+ } else {
+ Comparator comparator = new Comparator();
+ for (int i = 0; i < set.size(); i++) {
+ if (comparator.compare(list, set.get(i)) <= 0) {
+ set.add(i, list);
+ return;
+ }
+ }
+ set.add(set.size(), list);
+ }
+ }
+
+ /**
+ * Method checking list for existence
+ * */
+ public boolean contains(LinkedList list) {
+ for (LinkedList current : set) {
+ if (current.equals(list)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Method printing set
+ * */
+ public String print() {
+ StringBuilder result = new StringBuilder();
+ for (int i = 0; i < set.size(); i++) {
+ result.append(i + 1).append(". ");
+ for (Object value : set.get(i)) {
+ result.append(value).append(" ");
+ }
+ result.append("\n");
+ }
+ System.out.print(result.toString());
+ return result.toString();
+ }
+}
diff --git a/sem2/test2.1/src/test/java/com/AntonChernikov/g144/ApplicationTest.java b/sem2/test2.1/src/test/java/com/AntonChernikov/g144/ApplicationTest.java
new file mode 100644
index 0000000..c330d14
--- /dev/null
+++ b/sem2/test2.1/src/test/java/com/AntonChernikov/g144/ApplicationTest.java
@@ -0,0 +1,28 @@
+package com.AntonChernikov.g144;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ApplicationTest {
+
+ @Test
+ void addWords() {
+ Application app = new Application();
+ String[] words = {"abc", "def", "xyz"};
+ assertTrue(app.isEmpty());
+ app.addWords(words);
+ assertFalse(app.isEmpty());
+ }
+
+ @Test
+ void print() {
+ Application app = new Application();
+ String[] words = {"hello world", "good"};
+ app.addWords(words);
+ assertEquals("1. good \n2. hello world \n", app.print());
+ }
+}
\ No newline at end of file
diff --git a/sem2/test2.1/src/test/java/com/AntonChernikov/g144/SortedSetTest.java b/sem2/test2.1/src/test/java/com/AntonChernikov/g144/SortedSetTest.java
new file mode 100644
index 0000000..09aa460
--- /dev/null
+++ b/sem2/test2.1/src/test/java/com/AntonChernikov/g144/SortedSetTest.java
@@ -0,0 +1,28 @@
+package com.AntonChernikov.g144;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SortedSetTest {
+
+ @Test
+ void isEmptyAndAdd() {
+ SortedSet set = new SortedSet();
+ assertTrue(set.isEmpty());
+ set.add(new LinkedList(Arrays.asList("one", "two", "three")));
+ assertFalse(set.isEmpty());
+ }
+
+ @Test
+ void print() {
+ SortedSet set = new SortedSet();
+ set.add(new LinkedList(Arrays.asList("value", "string")));
+ set.add(new LinkedList(Arrays.asList("one")));
+ set.add(new LinkedList(Arrays.asList("word1", "word2", "word3", "word4")));
+ assertEquals("1. one \n2. value string \n3. word1 word2 word3 word4 \n", set.print());
+ }
+}
\ No newline at end of file