diff --git a/cv5/a_train.c b/cv5/a_train.c
index a19da5c..d2ee26a 100644
--- a/cv5/a_train.c
+++ b/cv5/a_train.c
@@ -40,12 +40,12 @@ void print_train(struct car* first) {
 
 void cancel_train(struct car* first) {   
     if(first == NULL){
-        return;
+        exit(0);
     }
     if(first->next != NULL){
-       first->next = NULL;
        cancel_train(first->next);
-       free(first);
+       first->next = NULL;
+       //free(first);
     }
     if(first->next == NULL){
         free(first);