# Remove $n$-th Node from End of [[linked-list|List]] https://leetcode.com/problems/remove-nth-node-from-end-of-list/ - Use `prehead` technique - Instead of a stack, use two pointer to specify the window ```python prehead = ListNode(0) prehead.next = head first = second = prehead for _ in range(n + 1): first = first.next while first: first = first.next second = second.next second.next = second.next.next return prehead.next ```