diff --git a/cv4/a_train.c b/cv4/a_train.c
index fe22a14..298bc60 100644
--- a/cv4/a_train.c
+++ b/cv4/a_train.c
@@ -7,9 +7,16 @@ struct car* add_car(struct car* first, const char* target){
     if(!strcmp(target, ""))
         return NULL;
 
+    if(!first){
+        first = (struct car*)calloc(1, sizeof(struct car));
+        strcpy(first->value, target);
+        first->next = NULL;
+        return first;
+    }
+
     struct car* temp = first;
 
-    while(temp != NULL)
+    while(temp->next != NULL)
         temp = temp->next;
 
     temp->next = (struct car*)calloc(1, sizeof(struct car));