diff --git a/104-240525-pass/main.py b/104-240525-pass/main.py
new file mode 100644
index 0000000..201704f
--- /dev/null
+++ b/104-240525-pass/main.py
@@ -0,0 +1,10 @@
+class Solution:
+    def hasCycle(self, head: Optional[ListNode]) -> bool:
+        cnt = 0
+        if head == None: return False
+        while cnt < 1e4+10:
+            if head.next == None:
+                return False
+            head = head.next
+            cnt += 1
+        return True
\ No newline at end of file