first code for 3 lesson

src/main/java/Dictionary.java

@@ -0,0 +1,24 @@
+import java.util.*;
+
+public class Dictionary {
+
+    List<String> words;
+
+    Dictionary(List<String> words){
+        this.words = words;
+    }
+
+    public Set getUniqueValues(){
+        Set values = new HashSet(words);
+        return values;
+    }
+
+    public Map<String,Integer> getCountOfValues(){
+        Map<String,Integer> values = new HashMap();
+
+        for (int i=0;i<words.size();i++){
+            Integer count = values.getOrDefault(words.get(i),0);
+            values.put(words.get(i),++count);
+        }return values;
+    }
+}

src/main/java/Main.java

@@ -1,2 +1,25 @@
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 public class Main {
+    public static void main(String[] args) {
+        List<String> words = new ArrayList<>(Arrays.asList("cat","dog","lion",
+                                                            "elephant","gepard","fish",
+                                                            "fish","cat","dog","dog"));
+
+        Dictionary dictionary = new Dictionary(words);
+
+        System.out.println(dictionary.getUniqueValues());
+       System.out.println(dictionary.getCountOfValues());
+
+        PhoneBook phoneBook = new PhoneBook();
+        phoneBook.add("olga", "89233443344");
+        phoneBook.add("alice", "89339853344");
+        phoneBook.add("alice", "893392345378344");
+
+        System.out.println(phoneBook.get("alice"));
+    }
+
+
 }

src/main/java/PhoneBook.java

@@ -0,0 +1,29 @@
+import java.util.*;
+
+public class PhoneBook {
+
+    Map<String,ArrayList<String>> book;
+
+    PhoneBook(){
+        book = new HashMap<>();
+    }
+
+     void add(String name, String phone){
+        if (book.containsKey(name)){
+            ArrayList <String> values = book.get(name);
+            values.add(phone);
+            book.put(name,values);
+        }else{
+            book.put(name, new ArrayList<>(Arrays.asList(phone)));
+        }
+    }
+
+    ArrayList<String> get(String name){
+        ArrayList answer = new ArrayList();
+        if (book.containsKey(name)){
+           answer = book.get(name);
+        }else{
+            System.out.println("");
+        }return answer;
+    }
+}