From ed62d338705e2add7b5c3eb5ae0566745246009e Mon Sep 17 00:00:00 2001
From: Hardik Pawar <hardikhpawar.cs21@rvce.edu.in>
Date: Thu, 3 Oct 2024 11:56:04 +0530
Subject: [PATCH] Fix

---
 data_structures/linked_list/merge_sort_linked_list.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/data_structures/linked_list/merge_sort_linked_list.py b/data_structures/linked_list/merge_sort_linked_list.py
index deaab02d4..68727685e 100644
--- a/data_structures/linked_list/merge_sort_linked_list.py
+++ b/data_structures/linked_list/merge_sort_linked_list.py
@@ -35,10 +35,12 @@ def get_middle(head: Node | None) -> Node | None:
     if head is None or head.next is None:
         return None
 
-    slow: Node = head
+    slow: Node | None = head
     fast: Node | None = head.next
 
     while fast is not None and fast.next is not None:
+        if slow is None:
+            return None
         slow = slow.next
         fast = fast.next.next