diff --git a/cv4/Makefile b/cv4/Makefile
new file mode 100644
index 0000000..3c2c463
--- /dev/null
+++ b/cv4/Makefile
@@ -0,0 +1,13 @@
+CFLAGS= -std=c99 -g -Wall
+
+all: train
+
+%.o: %.c
+	gcc -c -o $@ $< $(CFLAGS)
+
+train: main.o a_train.o
+	gcc main.o a_train.o -o train 
+
+clean:
+	rm *.o train
+
diff --git a/cv4/a_train.c b/cv4/a_train.c
new file mode 100644
index 0000000..c117b1a
--- /dev/null
+++ b/cv4/a_train.c
@@ -0,0 +1,72 @@
+#include "a_train.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct car* add_car(struct car* first, const char* target) {
+    struct car* last = first;
+    struct car* newcar = calloc(1, sizeof(struct car));
+    strcpy(newcar->value, target);
+
+    if (last != NULL) {
+        struct car* current = last;
+        while (current->next != NULL) {
+            current = current->next;
+        }
+        current->next = newcar;
+    } else {
+        last = newcar;
+        return last;
+    }
+
+    return first;
+}
+
+void print_train(struct car* first) {
+    if(first != NULL){
+        struct car* current = first;
+        while(current->next != NULL){
+            printf("%s\n", current->value);
+            current = current->next;
+        }
+    }
+}
+
+void cancel_train(struct car* first) {
+    struct car* current = first;
+    while(first != NULL){
+        current = current->next;
+        free(first);
+        first = current;
+    }
+}
+
+
+struct car* clear_train(struct car* first, const char* target) {
+    if (first == NULL) {
+        return NULL;
+    }
+
+    struct car* current = first;
+    struct car* previous = NULL;
+
+    while (current != NULL && strcmp(current->value, target) == 0) {
+        struct car* temp = current;
+        first = current->next;
+        current = first;
+        free(temp);
+    }
+
+    while (current != NULL) {
+        if (strcmp(current->value, target) == 0) {
+            previous->next = current->next;
+            free(current);
+            current = previous->next;
+        } else {
+            previous = current;
+            current = current->next;
+        }
+    }
+
+    return first;
+}
diff --git a/cv4/a_train.h b/cv4/a_train.h
new file mode 100644
index 0000000..5982bfe
--- /dev/null
+++ b/cv4/a_train.h
@@ -0,0 +1,51 @@
+#ifndef TRAIN_H
+#define TRAIN_H
+#define SIZE 100
+
+/**
+ * Jeden vozen vlaku
+ */
+struct car {
+    /**
+     * Nazov cielovej  stanice
+     */
+    char value[SIZE];
+    /**
+     * Smenik na dalsi vozen
+     */
+    struct car* next;
+};
+
+/**
+ * Prida vozen na koniec vlaku.
+ *
+ * @arg nazov cielovej stanice, ktory sa ma priradit novemu voznu.
+ * @return smernik na zaciatok vlaku.
+ */
+struct car* add_car(struct car* first,const char* target);
+
+
+/**
+ * Vypise vsetky vozne vo vlaku
+ *
+ * @arg smernik na prvy vozen
+ */
+void print_train(struct car* first);
+
+/**
+ * Zrusenie vsetkych voznov vo vlaku.
+ * @arg smernik na prvy vozen
+ */
+void cancel_train(struct car* first);
+
+/**
+ * Vyradenie vsetkych voznov, ktorych cielova stanica je target
+ *
+ * @arg smernik na prvy vozen
+ * @arg cielova stanica, ktora sa ma vyradit z vlaku.
+ * @return smernik na novy prvy vozen
+ *
+ */
+struct car* clear_train(struct car* first,const char* target);
+
+#endif // TRAIN_H
diff --git a/cv4/main.c b/cv4/main.c
new file mode 100644
index 0000000..a445b0d
--- /dev/null
+++ b/cv4/main.c
@@ -0,0 +1,17 @@
+#include "a_train.h"
+#include <stdio.h>
+
+// Testovaci subor pre vlak
+int main(){
+    struct car* train = NULL;
+    train = add_car(train,"Presov");
+    train = add_car(train,"Bratislava");
+    train = add_car(train,"Levoca");
+    train = add_car(train,"Spiska Nova Ves");
+    print_train(train);
+    train = clear_train(train,"Levoca");
+    print_train(train);
+    cancel_train(train);
+
+    return 0;
+}
diff --git a/cv4/program.c b/cv4/program.c
deleted file mode 100644
index e69de29..0000000