clear

cv5/a_train.c

@@ -59,6 +59,9 @@ struct car* clear_train(struct car* first, const char* target) {
             if(first->next == NULL){
                 free(first);
                 return NULL;
+            }
+            else{
+                return first;
             }  
             prev = first->next;
             free(first);