Linked Lists
25 problems — 8 easy, 13 medium, 4 hard.
| # | Title | Difficulty | Frequency |
|---|---|---|---|
| 2 | Add Two Numbers | medium | frequently asked |
| 19 | Remove Nth Node From End of List | medium | frequently asked |
| 21 | Merge Two Sorted Lists | easy | foundational |
| 24 | Swap Nodes in Pairs | medium | frequently asked |
| 25 | Reverse Nodes in k-Group | hard | frequently asked |
| 61 | Rotate List | medium | frequently asked |
| 82 | Remove Duplicates from Sorted List II | medium | frequently asked |
| 83 | Remove Duplicates from Sorted List | easy | foundational |
| 86 | Partition List | medium | frequently asked |
| 92 | Reverse Linked List II | medium | frequently asked |
| 138 | Copy List with Random Pointer | medium | frequently asked |
| 141 | Linked List Cycle | easy | foundational |
| 142 | Linked List Cycle II | medium | frequently asked |
| 143 | Reorder List | medium | frequently asked |
| 146 | LRU Cache | medium | very frequently asked |
| 148 | Sort List | medium | frequently asked |
| 160 | Intersection of Two Linked Lists | easy | foundational |
| 203 | Remove Linked List Elements | easy | foundational |
| 206 | Reverse Linked List | easy | foundational |
| 234 | Palindrome Linked List | easy | frequently asked |
| 328 | Odd Even Linked List | medium | frequently asked |
| 432 | All O`one Data Structure | hard | frequently asked |
| 460 | LFU Cache | hard | frequently asked |
| 876 | Middle of the Linked List | easy | foundational |
| 1206 | Design Skiplist | hard | occasionally asked |