Topic: linked-list-problem / Level: advanced

• 2001. Write a function to implement a skip list, a data structure that allows fast search within an ordered sequence of elements.
• 2002. How do you implement a self-balancing binary search tree (AVL tree) using a doubly linked list?
• 2003. Implement a function to convert a binary tree into a circular doubly linked list without using recursion.
• 2004. Write a function to merge k sorted linked lists into one sorted linked list using a priority queue.
• 2005. How do you implement a persistent linked list that supports version control of the list states?
• 2006. Implement a function to perform in-place quicksort on a singly linked list.
• 2007. Write a function to detect and merge two sorted singly linked lists that intersect at multiple points.
• 2008. How do you implement a copy of a linked list where each node has an additional random pointer?
• 2009. Implement a function to reverse every k-th node in a doubly linked list while preserving the relative order of the other nodes.
• 2010. Write a function to flatten a multilevel doubly linked list where each node may have multiple children and siblings.
• 2011. How do you perform a depth-first search (DFS) traversal on a graph implemented as a linked list of adjacency lists?
• 2012. Implement a function to perform in-place merge sort on a circular singly linked list.
• 2013. Write a function to delete every node from a linked list that matches a specific pattern using regular expressions.
• 2014. How do you reverse alternate groups of nodes in a doubly linked list and then merge them into one list?
• 2015. Implement a function to rotate a circular doubly linked list such that every third node becomes the new head.
• 2016. Write a function to split a singly linked list into k groups where each group contains at least one prime number.
• 2017. How do you merge k sorted doubly linked lists into one sorted circular doubly linked list?
• 2018. Implement a function to convert a doubly linked list into a balanced binary search tree (BST) in-place.
• 2019. Write a function to rotate a multilevel circular doubly linked list by k positions where each node has multiple children.
• 2020. How do you implement a sparse linked list that supports fast insertions and deletions at arbitrary positions?
• 2021. Implement a function to reverse the second half of a circular doubly linked list while preserving the first half.
• 2022. Write a function to rearrange nodes in a circular singly linked list such that the list alternates between even and odd values.
• 2023. How do you merge two linked lists where each node has a forward and backward pointer, and the lists are sorted in opposite orders?
• 2024. Implement a function to find the intersection point of two linked lists that may have cycles.
• 2025. Write a function to flatten a linked list where each node contains a linked list as its child.
• 2026. How do you delete all nodes in a circular doubly linked list whose values are divisible by a given number using recursion?
• 2027. Implement a function to rotate a doubly linked list so that the list becomes sorted in descending order.
• 2028. Write a function to reverse every alternate k-th node in a circular singly linked list.
• 2029. How do you implement a linked list that allows efficient random access to nodes using a hash table for indexing?
• 2030. Implement a function to rotate a singly linked list such that every k-th node becomes the new head.
• 2031. Write a function to merge two sorted linked lists where each node contains both a next pointer and a child pointer.
• 2032. How do you implement a circular doubly linked list with a skip pointer for faster traversal?
• 2033. Implement a function to reverse the first half of a doubly linked list while leaving the second half unchanged.
• 2034. Write a function to detect and merge two linked lists where both lists contain cycles.
• 2035. How do you split a circular singly linked list into k lists where each list contains exactly one prime number?
• 2036. Implement a function to flatten a multilevel doubly linked list with both forward and backward pointers.
• 2037. Write a function to rearrange nodes in a circular singly linked list such that nodes with prime values come before non-prime values.
• 2038. How do you implement a self-balancing skip list with multiple levels of linked lists?
• 2039. Implement a function to reverse every k-th node in a circular doubly linked list without using recursion.
• 2040. Write a function to merge two unsorted linked lists into one sorted circular doubly linked list using quicksort.
• 2041. How do you detect the first common node in two linked lists that may have arbitrary cycles?
• 2042. Implement a function to convert a binary search tree (BST) into a sorted circular doubly linked list in-place.
• 2043. Write a function to delete every alternate node from a circular doubly linked list where nodes have random pointers.
• 2044. How do you rotate a doubly linked list by k positions while maintaining the order of the first n nodes?
• 2045. Implement a function to reverse the first and last halves of a circular singly linked list separately.
• 2046. Write a function to flatten a multilevel circular singly linked list where nodes can have both children and siblings.
• 2047. How do you split a doubly linked list into two lists such that one list contains nodes with values divisible by a given number?
• 2048. Implement a function to merge two sorted doubly linked lists into one sorted circular doubly linked list without using extra memory.
• 2049. Write a function to reverse every alternate node in a circular singly linked list without breaking the list structure.
• 2050. How do you detect and remove a loop in a linked list where each node contains multiple pointers to other nodes?

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