diff --git a/cv5/a_train.c b/cv5/a_train.c
index 5521526..5042afb 100644
--- a/cv5/a_train.c
+++ b/cv5/a_train.c
@@ -16,10 +16,12 @@ struct car* add_car(struct car* first,const char* target) {
     struct car* newcar = calloc(1,sizeof(struct car));
     struct car* this=first;
     int length=0;
-    while(this!=NULL){
+    if(this==NULL){
+        return NULL;
+    }
+    else(this->!=NULL){
             this=this->next;
             this->next = newcar;
-        length++;
     }
     strcpy(newcar->value, target);
     return NULL;