From 58c9345dca476ee09de6e919b77a3511a81c6e56 Mon Sep 17 00:00:00 2001
From: PK-100 <68665655+PK-100@users.noreply.github.com>
Date: Tue, 27 Oct 2020 18:29:24 +0530
Subject: [PATCH] Create Start_Of_Linked_List_Cycle.py

---
 .../Start_Of_Linked_List_Cycle.py             | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 leetcode/October LeetCoding Challenge/Start_Of_Linked_List_Cycle.py

diff --git a/leetcode/October LeetCoding Challenge/Start_Of_Linked_List_Cycle.py b/leetcode/October LeetCoding Challenge/Start_Of_Linked_List_Cycle.py
new file mode 100644
index 0000000..9db8708
--- /dev/null
+++ b/leetcode/October LeetCoding Challenge/Start_Of_Linked_List_Cycle.py	
@@ -0,0 +1,38 @@
+# Definition for singly-linked list.
+# class ListNode:
+#     def __init__(self, x):
+#         self.val = x
+#         self.next = None
+
+class Solution:
+    def detectCycle(self, head: ListNode) -> ListNode:
+        try:
+            
+            slow = head.next
+            fast = head.next.next
+        
+            while slow != fast:
+                slow = slow.next
+                fast = fast.next.next
+            
+            else:
+                l = 1
+                temp = slow.next
+                while temp!=slow:
+                    temp = temp.next
+                    l+=1
+                
+            p1 = head
+            p2 = head
+            for i in range(l):
+                p2 = p2.next
+                
+            while p1!=p2:
+                p1 = p1.next
+                p2 = p2.next
+            
+            return p1
+                
+                
+        except:
+            return None # No Cycle