---
changelog:
  category: Release
  version: 20260831.161216.000000000
date: '2026-08-31T16:12:16Z'
seo:
  description: >-
    Finished Mon, Aug 31, 2026, 12:12 PM ET: all 3 core problems closed, 3
    problems closed that day. Scheduled: Mon Aug 31, 2026 · Phase: Phase II —
    Nodal & Grid…
title: Topic 08 — Linked List
type: changelog
---
<!-- release-topics: #10 -->
Finished Mon, Aug 31, 2026, 12:12 PM ET: all 3 core problems closed, 3 problems closed that day.

**Scheduled:** Mon Aug 31, 2026 · **Phase:** Phase II — Nodal & Grid · **Topic:** #10 · **Builds on:** independent primitive

## Closed Aug 31 — the day the topic finished

| Issue | Problem | Set | Difficulty | Closed (ET) | Solution |
| --- | --- | --- | --- | --- | --- |
| #77 | LC 206 · Reverse Linked List | core | easy | Aug 31 | [py](https://github.com/prdlk/leetcode/blob/20260831.161216.000000000/work/1/Easy/Linked%20List/206.reverse-linked-list.py) · [docs](https://lc.prd.lk/206) |
| #78 | LC 21 · Merge Two Sorted Lists | core | easy | Aug 31 | [py](https://github.com/prdlk/leetcode/blob/20260831.161216.000000000/work/1/Easy/Linked%20List/21.merge-two-sorted-lists.py) · [docs](https://lc.prd.lk/21) |
| #79 | LC 141 · Linked List Cycle | core | easy | Aug 31 | [py](https://github.com/prdlk/leetcode/blob/20260831.161216.000000000/work/1/Easy/Hash%20Table/141.linked-list-cycle.py) · [docs](https://lc.prd.lk/141) |

## Open at release

| Issue | Problem | Set | Difficulty | Closed (ET) | Solution |
| --- | --- | --- | --- | --- | --- |
| #80 | LC 19 · Remove Nth Node From End | optional | medium | — | — |
| #81 | LC 143 · Reorder List | optional | medium | — | — |
| #82 | LC 876 · Middle of the Linked List | optional | easy | — | — |
| #83 | LC 92 · Reverse Linked List II | optional | medium | — | — |
| #84 | LC 82 · Remove Duplicates from Sorted List II | optional | medium | — | — |
| #85 | LC 61 · Rotate List | optional | medium | — | — |
| #86 | LC 86 · Partition List | optional | medium | — | — |

---

`20260831.161216.000000000` is [timever](https://gist.github.com/twolfson/de1b004dd22536b8e668) for the UTC instant the core set completed; it tags 51ce47a, the last main commit before it.