Topic: linked-list-problem / Level: beginner

• 101. Write a function to merge k sorted linked lists into one sorted list.
• 102. How do you create a copy of a linked list using recursion?
• 103. Implement a function to delete every nth node in a linked list.
• 104. Write a function to find the node where two linked lists merge.
• 105. How do you insert a node at the middle of a linked list?
• 106. Write a function to reverse the order of nodes in groups of k in a singly linked list.
• 107. Implement a function to find the common elements in two linked lists.
• 108. How do you create a circular linked list from a doubly linked list?
• 109. Write a function to rearrange a linked list such that all even-indexed nodes come before odd-indexed nodes.
• 110. Implement a function to check if a linked list has a cycle using a slow and fast pointer approach.
• 111. How do you split a doubly linked list into two linked lists?
• 112. Write a function to count the number of times a given value occurs in a linked list.
• 113. How do you check if a circular linked list contains a loop?
• 114. Implement a function to merge two doubly linked lists.
• 115. Write a function to remove all nodes that have a greater node on the right side in a singly linked list.
• 116. How do you delete all nodes before a given node in a linked list?
• 117. Implement a function to delete all nodes after a given node in a singly linked list.
• 118. Write a function to find the sum of the values of all nodes in a doubly linked list.
• 119. How do you sort a linked list using selection sort?
• 120. Implement a function to count the number of even nodes in a linked list.
• 121. How do you check if two linked lists have the same elements?
• 122. Write a function to remove a node from the beginning of a circular linked list.
• 123. How do you find the sum of the elements in an odd-indexed linked list?
• 124. Implement a function to reverse a doubly linked list without changing its pointers.
• 125. Write a function to count the number of nodes in a circular doubly linked list.
• 126. How do you swap the head and tail of a doubly linked list?
• 127. Implement a function to reverse the data in a linked list, leaving the structure unchanged.
• 128. Write a function to delete every node that is greater than its previous node in a linked list.
• 129. How do you rearrange a linked list so that all nodes divisible by 3 appear at the end?
• 130. Implement a function to find the smallest element in a doubly linked list.
• 131. How do you insert a node at the k-th position in a circular linked list?
• 132. Write a function to rotate a doubly linked list by k positions.
• 133. How do you append one circular linked list to another?
• 134. Implement a function to delete nodes in a linked list that are smaller than the following node.
• 135. Write a function to remove all nodes whose value is greater than a given threshold.
• 136. How do you reverse the first half of a linked list?
• 137. Implement a function to delete all nodes whose value is smaller than the average of the linked list.
• 138. How do you remove the head node of a doubly linked list?
• 139. Write a function to find the second last element of a linked list.
• 140. How do you move the maximum element of a linked list to the end?
• 141. Implement a function to delete all odd-positioned nodes in a linked list.
• 142. Write a function to merge two circular linked lists into one.
• 143. How do you convert a doubly linked list into a singly linked list?
• 144. Implement a function to count the number of nodes in a circular singly linked list.
• 145. How do you append the elements of a doubly linked list to a singly linked list?
• 146. Write a function to reverse the order of elements in a doubly linked list.
• 147. How do you merge two unsorted linked lists into a sorted linked list?
• 148. Implement a function to insert a node in a doubly linked list at a given position.
• 149. Write a function to remove all even-positioned nodes in a doubly linked list.
• 150. How do you delete every second node in a doubly linked list?

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