diff --git a/linked-list-cycle/yuseok89.py b/linked-list-cycle/yuseok89.py
new file mode 100644
index 0000000000..6d956e6910
--- /dev/null
+++ b/linked-list-cycle/yuseok89.py
@@ -0,0 +1,22 @@
+# TC: O(N)
+# SC: O(1)
+# Definition for singly-linked list.
+# class ListNode:
+#     def __init__(self, x):
+#         self.val = x
+#         self.next = None
+
+class Solution:
+    def hasCycle(self, head: Optional[ListNode]) -> bool:
+        if not head or not head.next:
+            return False
+
+        slow, fast = head, head.next
+        while slow != fast:
+            if not fast or not fast.next:
+                return False
+
+            slow, fast = slow.next, fast.next.next
+
+        return True
+