diff --git a/cv4/a_train.c b/cv4/a_train.c
index e1c3f29..6320c29 100644
--- a/cv4/a_train.c
+++ b/cv4/a_train.c
@@ -3,6 +3,7 @@
 #include <string.h>
 #include <stdio.h>
 
+// Добавление вагона в конец списка
 struct car* add_car(struct car* first, const char* target) {
     struct car* new_car = (struct car*)malloc(sizeof(struct car));
     if (!new_car) {
@@ -26,20 +27,23 @@ struct car* add_car(struct car* first, const char* target) {
     return first;
 }
 
+// Вывод содержимого поезда
 void print_train(struct car* first) {
     struct car* current = first;
     
     if (current == NULL) {
-        printf("Vlak je prazdny.\n");
+        printf("The train is empty.\n");
         return;
     }
 
+    printf("Train composition:\n");
     while (current != NULL) {
         printf("%s\n", current->value);
         current = current->next;
     }
 }
 
+// Удаление всех вагонов, освобождение памяти
 void cancel_train(struct car* first) {
     struct car* current = first;
     
@@ -50,6 +54,7 @@ void cancel_train(struct car* first) {
     }
 }
 
+// Удаление вагонов с заданным направлением
 struct car* clear_train(struct car* first, const char* target) {
     struct car* current = first;
     struct car* prev = NULL;
diff --git a/cv4/main.c b/cv4/main.c
index 9e84f5c..931c238 100644
--- a/cv4/main.c
+++ b/cv4/main.c
@@ -1,22 +1,51 @@
 #include "a_train.h"
+#include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 int main() {
     struct car* train = NULL;
+    char input[SIZE];
+    int option;
 
-    train = add_car(train, "Bratislava");
-    train = add_car(train, "Kosice");
-    train = add_car(train, "Zilina");
+    do {
+        printf("\n--- Train Management ---\n");
+        printf("1. Add a car to the train\n");
+        printf("2. Print the train\n");
+        printf("3. Remove cars to Levoča\n");
+        printf("4. Exit\n");
+        printf("Select an option: ");
+        scanf("%d", &option);
+        getchar(); // Считываем символ новой строки после ввода числа
 
-    printf("Vsetky stanice vo vlaku:\n");
-    print_train(train);
+        switch (option) {
+            case 1:
+                printf("Enter the destination: ");
+                fgets(input, SIZE, stdin);
+                input[strcspn(input, "\n")] = '\0'; // Удаляем символ новой строки
+                train = add_car(train, input);
+                printf("Car added to the train.\n");
+                break;
 
-    printf("\nVyradujeme stanicu 'Kosice':\n");
-    train = clear_train(train, "Kosice");
-    print_train(train);
+            case 2:
+                print_train(train);
+                break;
 
-    printf("\nZrusenie celeho vlaku:\n");
-    cancel_train(train);
+            case 3:
+                train = clear_train(train, "Levoča");
+                printf("All cars to Levoča have been removed.\n");
+                break;
+
+            case 4:
+                printf("Exiting and releasing memory.\n");
+                cancel_train(train);
+                train = NULL;
+                break;
+
+            default:
+                printf("Invalid option. Please try again.\n");
+        }
+    } while (option != 4);
 
     return 0;
 }
diff --git a/cv7/.program.c.swp b/cv7/.program.c.swp
index 0366485..e76b682 100644
Binary files a/cv7/.program.c.swp and b/cv7/.program.c.swp differ