---
changelog:
  category: Release
  version: 20260826.192603.000000000
date: '2026-08-26T19:26:03Z'
seo:
  description: >-
    Finished Wed, Aug 26, 2026, 3:26 PM ET: all 5 core problems closed, 2
    problems closed that day. Scheduled: Wed Aug 26, 2026 · Phase: Phase I —
    Linear…
title: Topic 05 — Binary Search
type: changelog
---
<!-- release-topics: #7 -->
Finished Wed, Aug 26, 2026, 3:26 PM ET: all 5 core problems closed, 2 problems closed that day.

**Scheduled:** Wed Aug 26, 2026 · **Phase:** Phase I — Linear Structures · **Topic:** #7 · **Builds on:** ordered / monotonic invariants

## Closed Aug 26 — the day the topic finished

| Issue | Problem | Set | Difficulty | Closed (ET) | Solution |
| --- | --- | --- | --- | --- | --- |
| #61 | LC 74 · Search a 2D Matrix | core | medium | Aug 26 | [py](https://github.com/prdlk/leetcode/blob/20260826.192603.000000000/work/Medium/Array/74.search-a-2d-matrix.py) · [docs](https://lc.prd.lk/74) |
| #62 | LC 153 · Find Minimum in Rotated Sorted Array | core | medium | Aug 26 | [py](https://github.com/prdlk/leetcode/blob/20260826.192603.000000000/work/Medium/Array/153.find-minimum-in-rotated-sorted-array.py) · [docs](https://lc.prd.lk/153) |

## Closed earlier

| Issue | Problem | Set | Difficulty | Closed (ET) | Solution |
| --- | --- | --- | --- | --- | --- |
| #58 | LC 704 · Binary Search | core | easy | Aug 24 | [js](https://github.com/prdlk/leetcode/blob/20260826.192603.000000000/work/Easy/Array/704.binary-search.js) · [docs](https://lc.prd.lk/704) |
| #59 | LC 875 · Koko Eating Bananas | core | medium | Aug 24 | [js](https://github.com/prdlk/leetcode/blob/20260826.192603.000000000/work/Medium/Array/875.koko-eating-bananas.js) · [docs](https://lc.prd.lk/875) |
| #60 | LC 33 · Search in Rotated Sorted Array | core | medium | Aug 24 | [js](https://github.com/prdlk/leetcode/blob/20260826.192603.000000000/work/Medium/Array/33.search-in-rotated-sorted-array.js) · [docs](https://lc.prd.lk/33) |

## Open at release

| Issue | Problem | Set | Difficulty | Closed (ET) | Solution |
| --- | --- | --- | --- | --- | --- |
| #63 | LC 35 · Search Insert Position | optional | easy | — | — |
| #64 | LC 162 · Find Peak Element | optional | medium | — | — |
| #65 | LC 34 · First & Last Position | optional | medium | — | — |
| #66 | LC 4 · Median of Two Sorted Arrays | deferred | hard | — | — |

---

`20260826.192603.000000000` is [timever](https://gist.github.com/twolfson/de1b004dd22536b8e668) for the UTC instant the core set completed; it tags 1b5bdc4, the last main commit before it.