From 3a019b60f234ade31b3cd134880c2f94c79ddf9c Mon Sep 17 00:00:00 2001
From: Maryna Kravtsova <mk757ye@omega.tuke.sk>
Date: Mon, 2 Nov 2020 12:21:37 +0100
Subject: [PATCH] add

---
 cv5/a_train.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cv5/a_train.c b/cv5/a_train.c
index 570c209..b6d2b6a 100644
--- a/cv5/a_train.c
+++ b/cv5/a_train.c
@@ -11,6 +11,9 @@ struct car* add_car(struct car* first,const char* target) {
     if(first == NULL){
         return newcar;
     }
+    if(target == NULL){
+        return NULL;
+    }
     struct car *this = first;
     while(this->next != NULL){
         this = this->next;