diff --git a/src/lab3_abstract_factory/ex1/AbstractDoor.java b/src/lab3_abstract_factory/ex1/AbstractDoor.java
new file mode 100644
index 0000000..2caf795
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/AbstractDoor.java
@@ -0,0 +1,5 @@
+package lab3_abstract_factory.ex1;
+
+public abstract class AbstractDoor {
+    public abstract int getPrice();
+}
diff --git a/src/lab3_abstract_factory/ex1/AbstractWall.java b/src/lab3_abstract_factory/ex1/AbstractWall.java
new file mode 100644
index 0000000..335c4c2
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/AbstractWall.java
@@ -0,0 +1,5 @@
+package lab3_abstract_factory.ex1;
+
+public abstract class AbstractWall {
+    public abstract int getPrice();
+}
diff --git a/src/lab3_abstract_factory/ex1/AbstractWindows.java b/src/lab3_abstract_factory/ex1/AbstractWindows.java
new file mode 100644
index 0000000..b7feeef
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/AbstractWindows.java
@@ -0,0 +1,5 @@
+package lab3_abstract_factory.ex1;
+
+public abstract class AbstractWindows {
+    public abstract int getPrice();
+}
diff --git a/src/lab3_abstract_factory/ex1/ArchitectOffice.java b/src/lab3_abstract_factory/ex1/ArchitectOffice.java
new file mode 100644
index 0000000..2b9ca0e
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/ArchitectOffice.java
@@ -0,0 +1,26 @@
+package lab3_abstract_factory.ex1;
+
+import lab3_abstract_factory.ex1.house_factories.DutchHouseFactory;
+import lab3_abstract_factory.ex1.house_factories.GermanHouseFactory;
+import lab3_abstract_factory.ex1.house_factories.SwissWoodChaletFactory;
+
+public class ArchitectOffice {
+    public static void main(String[] args) {
+        House house1 = new House("Modern German house",
+                new GermanHouseFactory());
+        house1.buildHouse();
+        house1.calculatePrice();
+        House house2 = new House("Typical dutch house",
+                new DutchHouseFactory());
+        house2.buildHouse();
+        house2.calculatePrice();
+        House house3 = new House("Swiss wood chalet",
+                new SwissWoodChaletFactory());
+        house3.buildHouse();
+        house3.calculatePrice();
+
+        System.out.println(house1);
+        System.out.println(house2);
+        System.out.println(house3);
+    }
+}
\ No newline at end of file
diff --git a/src/lab3_abstract_factory/ex1/House.java b/src/lab3_abstract_factory/ex1/House.java
new file mode 100644
index 0000000..db768b3
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/House.java
@@ -0,0 +1,46 @@
+package lab3_abstract_factory.ex1;
+
+public class House {
+    private String name;
+    private HouseFactory houseFactory;
+    private AbstractWall wall;
+    private AbstractWindows windows;
+    private AbstractDoor door;
+
+    public House(String name, HouseFactory houseFactory) {
+        this.name = name;
+        this.houseFactory = houseFactory;
+    }
+
+    public void buildHouse() {
+        wall = houseFactory.buildWall();
+        windows = houseFactory.buildWindows();
+        door = houseFactory.buildDoor();
+        System.out.println(
+            "Building a house with "
+                + wall
+                + ", "
+                + windows
+                + " and a "
+                + door
+        );
+    }
+
+    public void calculatePrice() {
+        int total = 0;
+        total += wall.getPrice();
+        total += windows.getPrice();
+        total += door.getPrice();
+
+        System.out.println("Total price: " + total);
+    }
+
+    @Override
+    public String toString() {
+        return "House '" + name + "' (\n"
+                + "  Walls: " + wall + "\n"
+                + "  Windows: " + windows + "\n"
+                + "  Door: " + door + "\n"
+                + ")";
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/HouseFactory.java b/src/lab3_abstract_factory/ex1/HouseFactory.java
new file mode 100644
index 0000000..2c95d4e
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/HouseFactory.java
@@ -0,0 +1,7 @@
+package lab3_abstract_factory.ex1;
+
+public abstract class HouseFactory {
+    public abstract AbstractWall buildWall();
+    public abstract AbstractWindows buildWindows();
+    public abstract AbstractDoor buildDoor();
+}
diff --git a/src/lab3_abstract_factory/ex1/doors/LargeDoor.java b/src/lab3_abstract_factory/ex1/doors/LargeDoor.java
new file mode 100644
index 0000000..375738d
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/doors/LargeDoor.java
@@ -0,0 +1,15 @@
+package lab3_abstract_factory.ex1.doors;
+
+import lab3_abstract_factory.ex1.AbstractDoor;
+
+public class LargeDoor extends AbstractDoor {
+    @Override
+    public int getPrice() {
+        return 50;
+    }
+
+    @Override
+    public String toString() {
+        return "large door";
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/doors/ThinDoor.java b/src/lab3_abstract_factory/ex1/doors/ThinDoor.java
new file mode 100644
index 0000000..fc9dafd
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/doors/ThinDoor.java
@@ -0,0 +1,15 @@
+package lab3_abstract_factory.ex1.doors;
+
+import lab3_abstract_factory.ex1.AbstractDoor;
+
+public class ThinDoor extends AbstractDoor {
+    @Override
+    public int getPrice() {
+        return 25;
+    }
+
+    @Override
+    public String toString() {
+        return "thin door";
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/house_factories/DutchHouseFactory.java b/src/lab3_abstract_factory/ex1/house_factories/DutchHouseFactory.java
new file mode 100644
index 0000000..c1eb6e8
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/house_factories/DutchHouseFactory.java
@@ -0,0 +1,26 @@
+package lab3_abstract_factory.ex1.house_factories;
+
+import lab3_abstract_factory.ex1.AbstractDoor;
+import lab3_abstract_factory.ex1.AbstractWall;
+import lab3_abstract_factory.ex1.AbstractWindows;
+import lab3_abstract_factory.ex1.HouseFactory;
+import lab3_abstract_factory.ex1.doors.LargeDoor;
+import lab3_abstract_factory.ex1.walls.BricksWall;
+import lab3_abstract_factory.ex1.windows.FramedWindows;
+
+public class DutchHouseFactory extends HouseFactory {
+    @Override
+    public AbstractWall buildWall() {
+        return new BricksWall();
+    }
+
+    @Override
+    public AbstractWindows buildWindows() {
+        return new FramedWindows();
+    }
+
+    @Override
+    public AbstractDoor buildDoor() {
+        return new LargeDoor();
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/house_factories/GermanHouseFactory.java b/src/lab3_abstract_factory/ex1/house_factories/GermanHouseFactory.java
new file mode 100644
index 0000000..2803548
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/house_factories/GermanHouseFactory.java
@@ -0,0 +1,26 @@
+package lab3_abstract_factory.ex1.house_factories;
+
+import lab3_abstract_factory.ex1.AbstractDoor;
+import lab3_abstract_factory.ex1.AbstractWall;
+import lab3_abstract_factory.ex1.AbstractWindows;
+import lab3_abstract_factory.ex1.HouseFactory;
+import lab3_abstract_factory.ex1.doors.LargeDoor;
+import lab3_abstract_factory.ex1.walls.GlassWall;
+import lab3_abstract_factory.ex1.windows.FullHeightWindows;
+
+public class GermanHouseFactory extends HouseFactory {
+    @Override
+    public AbstractWall buildWall() {
+        return new GlassWall();
+    }
+
+    @Override
+    public AbstractWindows buildWindows() {
+        return new FullHeightWindows();
+    }
+
+    @Override
+    public AbstractDoor buildDoor() {
+        return new LargeDoor();
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/house_factories/SwissWoodChaletFactory.java b/src/lab3_abstract_factory/ex1/house_factories/SwissWoodChaletFactory.java
new file mode 100644
index 0000000..a93748e
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/house_factories/SwissWoodChaletFactory.java
@@ -0,0 +1,26 @@
+package lab3_abstract_factory.ex1.house_factories;
+
+import lab3_abstract_factory.ex1.AbstractDoor;
+import lab3_abstract_factory.ex1.AbstractWall;
+import lab3_abstract_factory.ex1.AbstractWindows;
+import lab3_abstract_factory.ex1.HouseFactory;
+import lab3_abstract_factory.ex1.doors.ThinDoor;
+import lab3_abstract_factory.ex1.walls.WoodWall;
+import lab3_abstract_factory.ex1.windows.FramedWindows;
+
+public class SwissWoodChaletFactory extends HouseFactory {
+    @Override
+    public AbstractWall buildWall() {
+        return new WoodWall();
+    }
+
+    @Override
+    public AbstractWindows buildWindows() {
+        return new FramedWindows();
+    }
+
+    @Override
+    public AbstractDoor buildDoor() {
+        return new ThinDoor();
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/walls/BricksWall.java b/src/lab3_abstract_factory/ex1/walls/BricksWall.java
new file mode 100644
index 0000000..d655246
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/walls/BricksWall.java
@@ -0,0 +1,15 @@
+package lab3_abstract_factory.ex1.walls;
+
+import lab3_abstract_factory.ex1.AbstractWall;
+
+public class BricksWall extends AbstractWall {
+    @Override
+    public int getPrice() {
+        return 10;
+    }
+
+    @Override
+    public String toString() {
+        return "brick walls";
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/walls/GlassWall.java b/src/lab3_abstract_factory/ex1/walls/GlassWall.java
new file mode 100644
index 0000000..cbd6d76
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/walls/GlassWall.java
@@ -0,0 +1,15 @@
+package lab3_abstract_factory.ex1.walls;
+
+import lab3_abstract_factory.ex1.AbstractWall;
+
+public class GlassWall extends AbstractWall {
+    @Override
+    public int getPrice() {
+        return 100;
+    }
+
+    @Override
+    public String toString() {
+        return "glass walls";
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/walls/WoodWall.java b/src/lab3_abstract_factory/ex1/walls/WoodWall.java
new file mode 100644
index 0000000..0cb9785
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/walls/WoodWall.java
@@ -0,0 +1,15 @@
+package lab3_abstract_factory.ex1.walls;
+
+import lab3_abstract_factory.ex1.AbstractWall;
+
+public class WoodWall extends AbstractWall {
+    @Override
+    public int getPrice() {
+        return 1;
+    }
+
+    @Override
+    public String toString() {
+        return "wood walls";
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/windows/FramedWindows.java b/src/lab3_abstract_factory/ex1/windows/FramedWindows.java
new file mode 100644
index 0000000..f857467
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/windows/FramedWindows.java
@@ -0,0 +1,15 @@
+package lab3_abstract_factory.ex1.windows;
+
+import lab3_abstract_factory.ex1.AbstractWindows;
+
+public class FramedWindows extends AbstractWindows {
+    @Override
+    public int getPrice() {
+        return 100;
+    }
+
+    @Override
+    public String toString() {
+        return "framed windows";
+    }
+}
diff --git a/src/lab3_abstract_factory/ex1/windows/FullHeightWindows.java b/src/lab3_abstract_factory/ex1/windows/FullHeightWindows.java
new file mode 100644
index 0000000..1272b7d
--- /dev/null
+++ b/src/lab3_abstract_factory/ex1/windows/FullHeightWindows.java
@@ -0,0 +1,15 @@
+package lab3_abstract_factory.ex1.windows;
+
+import lab3_abstract_factory.ex1.AbstractWindows;
+
+public class FullHeightWindows extends AbstractWindows {
+    @Override
+    public int getPrice() {
+        return 200;
+    }
+
+    @Override
+    public String toString() {
+        return "full-height windows";
+    }
+}