22 problems

Linked List interview problems

22 Linked List problems, from easy to hard. Each one has an editorial explaining the approach and its complexity, and a visualizer that runs the solution step by step on the example input or your own.

Easy (7)

21. Merge Two Sorted ListsEasy
80. Remove Duplicates from Sorted ListEasy
129. Linked List CycleEasy
143. Intersection of Two Linked ListsEasy
162. Reverse Linked ListEasy
186. Palindrome Linked ListEasy
310. Middle of the Linked ListEasy

Medium (13)

2. Add Two NumbersMedium
19. Remove Nth Node From End of ListMedium
58. Rotate ListMedium
79. Remove Duplicates from Sorted List IIMedium
82. Partition ListMedium
86. Reverse Linked List IIMedium
126. Copy List with Random PointerMedium
130. Linked List Cycle IIMedium
131. Reorder ListMedium
135. Sort ListMedium
189. Delete Node in a Linked ListMedium
252. Add Two Numbers IIMedium
369. Find the Minimum and Maximum Number of Nodes Between Critical PointsMedium

Hard (2)

23. Merge k Sorted ListsHard
24. Reverse Nodes in k-GroupHard

All topics · All problems