diff --git a/cv5/a_train.c b/cv5/a_train.c
index 33ff985..2cfff4a 100644
--- a/cv5/a_train.c
+++ b/cv5/a_train.c
@@ -15,11 +15,10 @@
 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;
     if(this==NULL){
         return newcar;
     }
-    else(this->next!=NULL){
+    while(this->next!=NULL){
             this=this->next;
             this->next = newcar;
     }
diff --git a/cv5/train.exe b/cv5/train.exe
deleted file mode 100644
index e3e9303..0000000
Binary files a/cv5/train.exe and /dev/null differ