Create 141. Linked List Cycle.java

Author: SharmaTushar1

java/141. Linked List Cycle.java

@@ -0,0 +1,14 @@
+//Fast and slow pointer
+
+public class Solution {
+    public boolean hasCycle(ListNode head) {
+        ListNode fast = head;
+        ListNode slow = head;
+        while (fast!=null && fast.next!=null) {
+            fast = fast.next.next;
+            slow = slow.next;
+            if (fast == slow) return true;
+        }
+        return false;
+    }
+}