876. Middle of the Linkedlist

Author: mytruong-z

middleNode.ts

@@ -0,0 +1,27 @@
+/**
+ * 876. Middle of the Linkedlist
+ * Topics: LinkedList, Two Points
+ * Given the head of a singly linked list, return the middle node of the linked list.
+* If there are two middle nodes, return the second middle node.
+ * Definition for singly-linked list.
+ * class ListNode {
+ *     val: number
+ *     next: ListNode | null
+ *     constructor(val?: number, next?: ListNode | null) {
+ *         this.val = (val===undefined ? 0 : val)
+ *         this.next = (next===undefined ? null : next)
+ *     }
+ * }
+ */
+
+function middleNode(head: ListNode | null): ListNode | null {
+    let fast = head;
+    let slow = head;
+
+    while (fast?.next) {
+        slow = slow.next;
+        fast = fast.next.next;
+    }
+
+    return slow;
+};