From 711d70e310bb685551cc6a25d8ea46b037f8c695 Mon Sep 17 00:00:00 2001
From: Keisuke KUDO <151166401+Apo-Matchbox@users.noreply.github.com>
Date: Thu, 5 Mar 2026 19:16:40 -0500
Subject: [PATCH] 142.shadowing(Floyd)

---
 142/142.shadowing(Floyd).md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 142/142.shadowing(Floyd).md

diff --git a/142/142.shadowing(Floyd).md b/142/142.shadowing(Floyd).md
new file mode 100644
index 0000000..3ef7037
--- /dev/null
+++ b/142/142.shadowing(Floyd).md
@@ -0,0 +1,27 @@
+# Floyd Solution
+
+```cpp
+class Solution {
+ public:
+    ListNode *detectCycle(ListNode *head) {
+        ListNode* slow = head;
+        ListNode* fast = head;
+
+        while (fast && fast->next) {
+            slow = slow->next;
+            fast = fast->next->next;
+
+            if (slow == fast) {
+                slow = fast;
+
+                while (slow != fast) {
+                    slow = slow->next;
+                    fast = slow->next;
+                }
+                return slow;
+            }
+        }
+        return nullptr;
+    }
+};
+```