diff --git a/task01/src/com/example/task01/Logger.java b/task01/src/com/example/task01/Logger.java
new file mode 100644
index 00000000..5b8ded80
--- /dev/null
+++ b/task01/src/com/example/task01/Logger.java
@@ -0,0 +1,85 @@
+package com.example.task01;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Logger {
+    private String Name;
+    private Level currentLevel = Level.DEBUG;
+    private static final Map<String, Logger> loggers = new HashMap<>();
+    public enum Level {
+        DEBUG(0),
+        INFO(1),
+        WARNING(2),
+        ERROR(3);
+
+        private final int priority;
+
+        Level(int priority) {
+            this.priority = priority;
+        }
+        public int getPriority() { return priority; }
+    }
+    Logger(String name){
+        this.Name = name;
+    }
+    public void setName(String name){
+        this.Name = name;
+    }
+    public String getName(){
+        return this.Name;
+    }
+    public Level getLevel() {
+        return currentLevel;
+    }
+
+    public void setLevel(Level level) {
+        this.currentLevel = level;
+    }
+    public static Logger getLogger(String name) {
+        return loggers.computeIfAbsent(name, Logger::new);
+    }
+    public void log(Level lvl, String message)
+    {
+        if (lvl.getPriority() >= currentLevel.getPriority()) {
+            String timestamp = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss").format(new Date());
+            System.out.printf("[%s] %s %s - %s%n", lvl.name(), timestamp, Name, message);
+        }
+    }
+    public void log(Level lvl, String message, Object... args) {
+        log(lvl, String.format(message, args));
+    }
+    public void debug(String message) {
+        log(Level.DEBUG, message);
+    }
+
+    public void debug(String message, Object... args) {
+        log(Level.DEBUG, message, args);
+    }
+
+    public void info(String message) {
+        log(Level.INFO, message);
+    }
+
+    public void info(String message, Object... args) {
+        log(Level.INFO, message, args);
+    }
+
+    public void warning(String message) {
+        log(Level.WARNING, message);
+    }
+
+    public void warning(String message, Object... args) {
+        log(Level.WARNING, message, args);
+    }
+
+    public void error(String message) {
+        log(Level.ERROR, message);
+    }
+
+    public void error(String message, Object... args) {
+        log(Level.ERROR, message, args);
+    }
+}
diff --git a/task02/src/com/example/task02/DiscountBill.java b/task02/src/com/example/task02/DiscountBill.java
new file mode 100644
index 00000000..85ca62cc
--- /dev/null
+++ b/task02/src/com/example/task02/DiscountBill.java
@@ -0,0 +1,21 @@
+package com.example.task02;
+
+public class DiscountBill extends Bill{
+    private double Discount;
+
+    @Override
+    public long getPrice(){
+        return (long)(super.getPrice() - super.getPrice() * (Discount / 100));
+    }
+
+    public long getAbsDiscount(){
+        return super.getPrice() - getPrice();
+    }
+
+    public void setDiscount(double discount){
+        this.Discount = discount;
+    }
+    public String  getDiscount(){
+        return this.Discount + "%";
+    }
+}
diff --git a/task03/src/com/example/task03/Hours.java b/task03/src/com/example/task03/Hours.java
new file mode 100644
index 00000000..4692a44b
--- /dev/null
+++ b/task03/src/com/example/task03/Hours.java
@@ -0,0 +1,29 @@
+package com.example.task03;
+
+public class Hours implements TimeUnit{
+    private final long amount;
+
+    public Hours(long amount) {
+        this.amount = amount;
+    }
+
+    @Override
+    public long toMillis() {
+        return amount * 60 * 60 * 1000;
+    }
+
+    @Override
+    public long toSeconds() {
+        return amount * 60 * 60;
+    }
+
+    @Override
+    public long toMinutes() {
+        return amount * 60;
+    }
+
+    @Override
+    public long toHours() {
+        return amount;
+    }
+}
diff --git a/task03/src/com/example/task03/Milliseconds.java b/task03/src/com/example/task03/Milliseconds.java
index 5115bc7d..4110b2c6 100644
--- a/task03/src/com/example/task03/Milliseconds.java
+++ b/task03/src/com/example/task03/Milliseconds.java
@@ -18,11 +18,16 @@ public long toMillis() {
 
     @Override
     public long toSeconds() {
-        return amount / 1000;
+        return Math.round(amount / 1000d);
     }
 
     @Override
     public long toMinutes() {
-        return amount / 1000 * 60;
+        return Math.round(amount / 1000d / 60d);
+    }
+
+    @Override
+    public long toHours() {
+        return Math.round(amount / 1000d / 60d / 60d);
     }
 }
diff --git a/task03/src/com/example/task03/Minutes.java b/task03/src/com/example/task03/Minutes.java
index d6fa0594..10fa3655 100644
--- a/task03/src/com/example/task03/Minutes.java
+++ b/task03/src/com/example/task03/Minutes.java
@@ -2,26 +2,29 @@
 
 public class Minutes implements TimeUnit {
 
+    private final long amount;
+
     public Minutes(long amount) {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        this.amount = amount;
     }
 
     @Override
     public long toMillis() {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        return amount * 60 * 1000;
     }
 
     @Override
     public long toSeconds() {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        return amount * 60;
     }
 
     @Override
     public long toMinutes() {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        return amount;
+    }
+
+    @Override
+    public long toHours() {
+        return Math.round(amount / 60d);
     }
 }
diff --git a/task03/src/com/example/task03/Seconds.java b/task03/src/com/example/task03/Seconds.java
index ce6bc213..1c348772 100644
--- a/task03/src/com/example/task03/Seconds.java
+++ b/task03/src/com/example/task03/Seconds.java
@@ -23,6 +23,11 @@ public long toSeconds() {
 
     @Override
     public long toMinutes() {
-        return Math.round(amount / 60);
+        return Math.round(amount / 60d);
+    }
+
+    @Override
+    public long toHours() {
+        return Math.round(amount / 60d / 60d);
     }
 }
diff --git a/task03/src/com/example/task03/Task03Main.java b/task03/src/com/example/task03/Task03Main.java
index ff0f14b0..ef971c9c 100644
--- a/task03/src/com/example/task03/Task03Main.java
+++ b/task03/src/com/example/task03/Task03Main.java
@@ -10,5 +10,6 @@ private static void printTimeUnit(TimeUnit unit) {
         System.out.println(String.format("Milliseconds: %d", unit.toMillis()));
         System.out.println(String.format("Seconds:      %d", unit.toSeconds()));
         System.out.println(String.format("Minutes:      %d", unit.toMinutes()));
+        System.out.println(String.format("Hours:        %d", unit.toHours()));
     }
 }
diff --git a/task03/src/com/example/task03/TimeUnit.java b/task03/src/com/example/task03/TimeUnit.java
index 3b123fb8..bf03dcd8 100644
--- a/task03/src/com/example/task03/TimeUnit.java
+++ b/task03/src/com/example/task03/TimeUnit.java
@@ -28,4 +28,11 @@ public interface TimeUnit {
      */
     long toMinutes();
 
+    /**
+     * Возвращает продолжительность текущего интервала, пересчитанного в часах.
+     * При необходимости округлять по обычным правилам округления (число, меньшее 0.5 переходит в 0, большее или равное - в 1)
+     *
+     * @return количество часов в текущем интервале
+     */
+    long toHours();
 }
diff --git a/task03/src/com/example/task03/TimeUnitUtils.java b/task03/src/com/example/task03/TimeUnitUtils.java
index 790f8850..934bc12e 100644
--- a/task03/src/com/example/task03/TimeUnitUtils.java
+++ b/task03/src/com/example/task03/TimeUnitUtils.java
@@ -5,23 +5,41 @@
  */
 public class TimeUnitUtils {
 
-    /**
-     * Конвертирует интервал в секундах в интервал в миллисекундах
-     *
-     * @param seconds интервал в секундах
-     * @return интервал в миллисекундах
-     */
+    public static Milliseconds toMillis(Hours hours) {
+        return new Milliseconds(hours.toMillis());
+    }
+    public static Milliseconds toMillis(Minutes minutes) {
+        return new Milliseconds(minutes.toMillis());
+    }
     public static Milliseconds toMillis(Seconds seconds) {
         return new Milliseconds(seconds.toMillis());
     }
-
-    /**
-     * Конвертирует интервал в миллисекундах в интервал в секундах
-     *
-     * @param millis интервал в миллисекундах
-     * @return интервал в секундах
-     */
+    public static Seconds toSeconds(Hours hours) {
+        return new Seconds(hours.toSeconds());
+    }
+    public static Seconds toSeconds(Minutes minutes) {
+        return new Seconds(minutes.toSeconds());
+    }
     public static Seconds toSeconds(Milliseconds millis) {
         return new Seconds(millis.toSeconds());
     }
+    public static Minutes toMinutes(Hours hours) {
+        return new Minutes(hours.toMinutes());
+    }
+    public static Minutes toMinutes(Minutes minutes) {
+        return new Minutes(minutes.toMinutes());
+    }
+    public static Minutes toMinutes(Milliseconds millis) {
+        return new Minutes(millis.toMinutes());
+    }
+    public static Hours toHours(Hours hours) {
+        return new Hours(hours.toHours());
+    }
+    public static Hours toHours(Minutes minutes) {
+        return new Hours(minutes.toHours());
+    }
+    public static Hours toHours(Milliseconds millis) {
+        return new Hours(millis.toHours());
+    }
+
 }
diff --git a/task04/src/com/example/task04/ConsoleHandler.java b/task04/src/com/example/task04/ConsoleHandler.java
new file mode 100644
index 00000000..94bc1c80
--- /dev/null
+++ b/task04/src/com/example/task04/ConsoleHandler.java
@@ -0,0 +1,8 @@
+package com.example.task04;
+
+public class ConsoleHandler implements MessageHandler{
+    @Override
+    public void handleMessage(String message){
+        System.out.println(message);
+    }
+}
diff --git a/task04/src/com/example/task04/FileHandler.java b/task04/src/com/example/task04/FileHandler.java
new file mode 100644
index 00000000..d00550af
--- /dev/null
+++ b/task04/src/com/example/task04/FileHandler.java
@@ -0,0 +1,22 @@
+package com.example.task04;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class FileHandler implements MessageHandler {
+    public String FilePath;
+
+    public FileHandler(String filePath) {
+        this.FilePath = filePath;
+    }
+
+    @Override
+    public void handleMessage(String message) {
+        try (BufferedWriter writer = new BufferedWriter(new FileWriter(FilePath, true))) {
+            writer.write(message);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/task04/src/com/example/task04/Logger.java b/task04/src/com/example/task04/Logger.java
new file mode 100644
index 00000000..09b54e1c
--- /dev/null
+++ b/task04/src/com/example/task04/Logger.java
@@ -0,0 +1,52 @@
+package com.example.task04;
+
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+public class Logger {
+    private String Name;
+    private Level currentLevel = Level.DEBUG;
+    private static final Map<String, Logger> loggers = new HashMap<>();
+    MessageHandler handler;
+    public enum Level {
+        DEBUG(0),
+        INFO(1),
+        WARNING(2),
+        ERROR(3);
+
+        private final int priority;
+
+        Level(int priority) {
+            this.priority = priority;
+        }
+        public int getPriority() { return priority; }
+    }
+    Logger(String name){
+        this.Name = name;
+    }
+    public void setName(String name){
+        this.Name = name;
+    }
+    public String getName(){
+        return this.Name;
+    }
+    public Level getLevel() {
+        return currentLevel;
+    }
+
+    public void setLevel(Level level) {
+        this.currentLevel = level;
+    }
+    public static Logger getLogger(String name) {
+        return loggers.computeIfAbsent(name, Logger::new);
+    }
+    public void SetHandler(MessageHandler handler){
+        this.handler = handler;
+    }
+    public void log(MessageHandler handler, Level lvl, String message)
+    {
+        if (lvl.getPriority() >= currentLevel.getPriority()) {
+            handler.handleMessage(message);
+        }
+    }
+}
diff --git a/task04/src/com/example/task04/MemoryHandler.java b/task04/src/com/example/task04/MemoryHandler.java
new file mode 100644
index 00000000..d5a57c04
--- /dev/null
+++ b/task04/src/com/example/task04/MemoryHandler.java
@@ -0,0 +1,28 @@
+package com.example.task04;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MemoryHandler implements MessageHandler{
+    private final List<String> messageBuffer = new ArrayList<>();
+    private final int bufferSize;
+    private final ConsoleHandler proxiedHandler;
+
+    public MemoryHandler(ConsoleHandler proxiedHandler, int bufferSize) {
+        this.proxiedHandler = proxiedHandler;
+        this.bufferSize = bufferSize;
+    }
+    public void push() {
+        for (String msg : messageBuffer) {
+            proxiedHandler.handleMessage(msg);
+        }
+        messageBuffer.clear();
+    }
+    @Override
+    public void handleMessage(String message) {
+        messageBuffer.add(message);
+        if (messageBuffer.size() >= bufferSize) {
+            push();
+        }
+    }
+}
diff --git a/task04/src/com/example/task04/MessageHandler.java b/task04/src/com/example/task04/MessageHandler.java
new file mode 100644
index 00000000..ab661a7f
--- /dev/null
+++ b/task04/src/com/example/task04/MessageHandler.java
@@ -0,0 +1,6 @@
+package com.example.task04;
+
+@FunctionalInterface
+public interface MessageHandler {
+    void handleMessage(String message);
+}
diff --git a/task04/src/com/example/task04/RotationFileHandler.java b/task04/src/com/example/task04/RotationFileHandler.java
new file mode 100644
index 00000000..7871fb44
--- /dev/null
+++ b/task04/src/com/example/task04/RotationFileHandler.java
@@ -0,0 +1,38 @@
+package com.example.task04;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+
+public class RotationFileHandler extends FileHandler implements MessageHandler{
+    private ChronoUnit RotationUnit;
+    private LocalDateTime LastRotation;
+    private FileWriter Writer;
+
+    public RotationFileHandler(String filePath) {
+        super(filePath);
+    }
+
+    private void rotateFile() throws IOException {
+        if (Writer != null) {
+            Writer.close();
+        }
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm");
+        String rotatedFilePath = FilePath + "_" + LastRotation.format(formatter);
+        Writer = new FileWriter(rotatedFilePath, true);
+    }
+    @Override
+    public void handleMessage(String message) {
+        try {
+            if (LocalDateTime.now().isAfter(LastRotation.plus(1, RotationUnit))) {
+                LastRotation = LocalDateTime.now();
+                rotateFile();
+            }
+            Writer.write(message);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
\ No newline at end of file