diff --git a/LeetCode/cycle1.cpp b/LeetCode/cycle1.cpp
new file mode 100644
index 00000000..a6d81f66
--- /dev/null
+++ b/LeetCode/cycle1.cpp
@@ -0,0 +1,27 @@
+// Complete the has_cycle function below.
+
+/*
+ * For your reference:
+ *
+ * SinglyLinkedListNode {
+ *     int data;
+ *     SinglyLinkedListNode* next;
+ * };
+ *
+ */
+bool has_cycle(SinglyLinkedListNode* head) {
+    if(head==nullptr)
+        return false;
+    SinglyLinkedListNode *slow=head,*fast=head;
+    
+    while(fast && fast->next)
+    {
+        slow = slow->next;
+        fast = fast->next->next;
+        if(slow == fast)
+            return true;
+    }
+    return false;
+
+    
+}