Recent LeetCode Discuss posts, summarised

Turn the last few weeks of interview write-ups on LeetCode Discuss into one doc in 繁體中文: the posts worth reading, the questions that came up more than once, and which of those problems this repo has never practised.

Invocation: /lc-discussion <keywords> [--days N] — e.g. /lc-discussion google, /lc-discussion google l3 --days 30, /lc-discussion amazon oa.

Why this exists

leetcode.com/discuss/ renders in the browser, so fetching the page returns an empty shell, and most of what the listing shows is noise: team-matching threads, pay questions, roadmap posts that mention the company name once. In the Oct 2026 Google scan, about 30 of 200 posts described an actual coding question. The useful part is reading those 30 and lining them up against the log. That turned up five problems that had come straight from L3/L4 loops and had never been practised (1235, 3026, 1218, 2812, 1101).