function removeNthFromEnd(head: ListNode | null, n: number): ListNode | null {
    let dummy = new ListNode(0); // Dummy node to handle edge cases
    dummy.next = head;
    let fast: ListNode | null = dummy;
    let slow: ListNode | null = dummy;

    // Advance 'fast' by 'n' nodes
    for (let i = 0; i < n + 1; i++) {
        fast = fast.next;
    }

    // Traverse the list until 'fast' reaches the end
    while (fast !== null) {
        fast = fast.next;
        slow = slow.next;
    }

    // 'slow' is just before the Nth node, remove it
    if (slow.next !== null) {
        slow.next = slow.next.next;
    }

    return dummy.next; // Return the new head of the list
}