| 2 | Add Two Numbers | Medium |
| 19 | Remove Nth Node From End of List | Medium |
| 21 | Merge Two Sorted Lists | Easy |
| 23 | Merge k Sorted Lists | Hard |
| 24 | Swap Nodes in Pairs | Medium |
| 25 | Reverse Nodes in k-Group | Hard |
| 61 | Rotate List | Medium |
| 82 | Remove Duplicates from Sorted List II | Medium |
| 83 | Remove Duplicates from Sorted List | Easy |
| 86 | Partition List | Medium |
| 92 | Reverse Linked List II | Medium |
| 109 | Convert Sorted List to Binary Search Tree | Medium |
| 138 | Copy List with Random Pointer | Medium |
| 141 | Linked List Cycle | Easy |
| 142 | Linked List Cycle II | Medium |
| 143 | Reorder List | Medium |
| 147 | Insertion Sort List | Medium |
| 148 | Sort List | Medium |
| 160 | Intersection of Two Linked Lists | Easy |
| 203 | Remove Linked List Elements | Easy |
| 206 | Reverse Linked List | Easy |
| 234 | Palindrome Linked List | Easy |
| 237 | Delete Node in a Linked List | Easy |
| 328 | Odd Even Linked List | Medium |
| 355 | Design Twitter | Medium |
| 382 | Linked List Random Node | Medium |
| 430 | Flatten a Multilevel Doubly Linked List | Medium |
| 432 | All O`one Data Structure | Hard |
| 445 | Add Two Numbers II | Medium |
| 460 | LFU Cache | Hard |