diff --git a/lesson_3/exercise_1.hpp b/lesson_3/exercise_1.hpp
index a3b6dac..11bbc18 100644
--- a/lesson_3/exercise_1.hpp
+++ b/lesson_3/exercise_1.hpp
@@ -87,8 +87,9 @@ public:
 
 class Square : public Parallelogram
 {
-	Square(float side_a, float side_b)
-	: Parallelogram(side_a, side_b, side_b) { }
+public:
+	Square(float side_a)
+	: Parallelogram(side_a, side_a, side_a) { }
 
 	float area()
 	{
@@ -102,6 +103,7 @@ class Square : public Parallelogram
 
 class Rhombus : public Parallelogram
 {
+public:
 	Rhombus(float side_a, float side_b)
 	: Parallelogram(side_a, side_b, side_b) { }
 
diff --git a/lesson_3/exercise_2.hpp b/lesson_3/exercise_2.hpp
index 5c99457..9965410 100644
--- a/lesson_3/exercise_2.hpp
+++ b/lesson_3/exercise_2.hpp
@@ -1,8 +1,56 @@
 #ifndef EXERCISE_2_HPP_
 #define EXERCISE_2_HPP_
 
+#include <iostream>
 
+class Car
+{
+private:
+	std::string m_company;
+	std::string m_model;
+protected:
+    std::string getCompany() const
+    {
+        return m_company;
+    }
 
+    std::string getModel() const
+    {
+        return m_model;
+    }
+public:
+	Car(std::string company, std::string model) : m_company(company), m_model(model)
+    {
+        std::cout << "Транспортное средство компании " + getCompany() + ", модель " + getModel() << std::endl;
+    }
+};
 
+class PassengerCar : virtual public Car
+{
+public:
+	PassengerCar(std::string company, std::string model) : Car(company, model)
+    {
+        std::cout << "Легковой автомобиль компании " + getCompany() + ", модель " + getModel() << std::endl;
+    }
+};
+
+class Bus : virtual public Car
+{
+public:
+	Bus(std::string company, std::string model) : Car(company, model)
+    {
+        std::cout << "Автобус компании " + getCompany() + ", модель " + getModel() << std::endl;
+    }
+};
+
+class Minivan : public PassengerCar, public Bus
+{
+public:
+	Minivan(std::string company, std::string model) :
+		PassengerCar(company, model), Bus(company, model), Car(company, model)
+    {
+        std::cout << "Минивэн компании " + getCompany() + ", модель " + getModel() << std::endl;
+    }
+};
 
 #endif
diff --git a/lesson_3/main.cpp b/lesson_3/main.cpp
index 40a5fd6..a7bc753 100644
--- a/lesson_3/main.cpp
+++ b/lesson_3/main.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <functional>
 #include <vector>
 #include "exercise_1.hpp"
 #include "exercise_2.hpp"
@@ -7,13 +8,67 @@
 
 using namespace std;
 
+void ex_1();
+void ex_2();
+void ex_3();
+void ex_4();
+void ex_5();
+
 int main()
 {
-	// Exercise 1
-
-	Parallelogram A(15, 9);
-
-//	Figure* figures[5];
+//	ex_1();
+	ex_2();
+	ex_3();
+	ex_4();
+	ex_5();
 
 	return 0;
 }
+
+void ex_1()
+{
+	Parallelogram Pgrm(15.2, 9.5);
+	Circle Crcl(14.5);
+	Rectangle Rctgl(14.0, 7.1);
+	Square Sqre(23.3);
+	Rhombus Rmbs(17.4, 13.2);
+
+	vector<reference_wrapper<Figure>> f;
+
+	f.push_back(Pgrm);
+	f.push_back(Crcl);
+	f.push_back(Rctgl);
+	f.push_back(Sqre);
+	f.push_back(Rmbs);
+
+	for (reference_wrapper<Figure> c : f)
+		c.get().area();
+
+	/*
+	 * Площадь параллелограмма равна 144.4
+	 * Площадь круга равна 660.52
+	 * Площадь прямоугольника равна 99.4
+	 * Площадь квадрата равна 542.89
+	 * Площадь ромба равна 229.68
+	 */
+}
+
+void ex_2()
+{
+	Minivan m("Макдоналдс", "ABC");
+}
+
+void ex_3()
+{
+
+}
+
+void ex_4()
+{
+
+}
+
+void ex_5()
+{
+
+}