PROBLEMS/LINKED LIST
Linked List LeetCode Problems
48 hand-tagged Linked List problems across 3 interview patterns (Fast/Slow Pointers (Cycle, Middle), Reversal (Full and Partial), Merge Linked Lists), ranked by importance (how often each pattern shows up in real coding interviews). Work top-down within each pattern.
| # | PROBLEM | DIFF | ELO | IMP | PATTERNS |
|---|---|---|---|---|---|
| 1 | Linked List Cycle | Easy | 1068 | 90 | |
| 2 | Remove Nth Node From End of List | Easy | 1207 | 82 | Same-Direction (Fast/Slow on Arrays) |
| 3 | Middle of the Linked List | Easy | 1232 | 82 | Same-Direction (Fast/Slow on Arrays) |
| 4 | Linked List Cycle II | Easy | 1369 | 78 | |
| 5 | Intersection of Two Linked Lists | Easy | 1176 | 76 | Opposite-Direction (Converging) |
| # | PROBLEM | DIFF | ELO | IMP | PATTERNS |
|---|---|---|---|---|---|
| 1 | Reverse Linked List | Easy | 1025 | 93 | |
| 2 | Reorder List | Medium | 1487 | 85 | Fast/Slow Pointers (Cycle, Middle) · Merge Linked Lists |
| 3 | Reverse Linked List II | Medium | 1418 | 82 | |
| 4 | Reverse Nodes in k-Group | Medium | 1678 | 80 | |
| 5 | Maximum Twin Sum of a Linked List | Easy | 1318 | 68 | Fast/Slow Pointers (Cycle, Middle) · Opposite-Direction (Converging) |
| # | PROBLEM | DIFF | ELO | IMP | PATTERNS |
|---|---|---|---|---|---|
| 1 | Merge Two Sorted Lists | Easy | 1107 | 88 | |
| 2 | Add Two Numbers | Easy | 1262 | 78 | General Math |
| 3 | Sort List | Medium | 1534 | 72 | Fast/Slow Pointers (Cycle, Middle) · Sorting + Comparison |
| 4 | Partition List | Easy | 1283 | 58 | Same-Direction (Fast/Slow on Arrays) |
| 5 | Merge In Between Linked Lists | Medium | 1428 | 45 |
EVERY PATTERN
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