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Author: cmcoffeedev

0141-linked-list-cycle/0141-linked-list-cycle-04-23-2025-15-12-28.java

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+/**
+ * Definition for singly-linked list.
+ * class ListNode {
+ *     int val;
+ *     ListNode next;
+ *     ListNode(int x) {
+ *         val = x;
+ *         next = null;
+ *     }
+ * }
+ */
+public class Solution {
+    public boolean hasCycle(ListNode head) {
+        if(head == null) return false;
+        ListNode slow = head;
+        ListNode fast = head.next;
+        while(fast != null && fast.next != null){
+            if(slow == fast) return true;
+            slow = slow.next;
+            fast = fast.next.next;
+        }
+        return false;
+    }
+}